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Subject-Verb Agreement

70 questions

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Question 61Question →

The construction of traditional Polynesian voyaging canoes requires not only deep ecological knowledge but also exceptional craftsmanship. The wood selected from native forests, along with fibers from coconut husks used to lash the hull, are carefully cured over several months to ensure durability at sea.

Which of the following options is the correct form of the underlined verb?

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Answer: is

Answer

is
The correct option is the singular present-tense verb 'is'. The subject of the sentence is 'wood,' which is singular. The phrase starting with 'along with' is parenthetical and does not change the subject's number. A singular verb is required to maintain subject-verb agreement, and the present tense must be maintained to match the context established by the verb 'requires' in the first sentence.

Step-by-Step Solution

1
Identify the subject of the verb in question.
The subject is the singular noun 'wood.'
The phrase 'along with fibers from coconut husks used to lash the hull' is a parenthetical prepositional phrase that modifies the subject but does not make it plural.
2
Determine the correct verb number (singular vs. plural) and tense.
The verb must be singular and in the present tense ('is').
Subject-verb agreement requires a singular verb for the singular subject 'wood,' and the passage is written in the present tense as established by 'requires' in the first sentence.

Key Concept

Subject-Verb Agreement
Question 62Question →

The sentence below has a blank. Complete the sentence by writing the correct present-tense form of the verb 'to suggest' in the blank, ensuring that it maintains proper subject-verb agreement.

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A collection of letters written by the nineteenth-century poet, in addition to several unpublished journals, that she traveled extensively throughout Europe.
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Answer

suggests
The correct answer is the singular verb 'suggests'. The grammatical subject of the sentence is the singular noun 'collection'. The phrases 'of letters written by the nineteenth-century poet' and 'in addition to several unpublished journals' are intervening modifiers that contain plural nouns ('letters', 'journals') but do not alter the singular status of the subject. A singular subject requires the singular verb form 'suggests'.

Step-by-Step Solution

1
Identify the true grammatical subject of the sentence.
The subject is 'collection', which is a singular noun.
Subject-verb agreement is determined by the main subject of the clause, not by nouns within modifying phrases.
2
Identify and ignore intervening prepositional or additive phrases between the subject and the verb.
The prepositional phrase 'of letters written by the nineteenth-century poet' and the parenthetical phrase 'in addition to several unpublished journals' contain plural nouns ('letters', 'journals') but do not change the singular nature of the subject 'collection'.
Prepositional phrases and parenthetical structures starting with 'in addition to' do not compound the subject.
3
Match the singular subject with the correct present-tense singular form of the verb 'to suggest'.
The singular present-tense form is 'suggests'.
Singular subjects require singular verbs, which end in an 's' in the present tense.

Key Concept

Subject-Verb Agreement with Intervening Phrases
Question 63Question →

The intricate tunnel network constructed by leafcutter ants serves as a highly organized underground city. Within this subterranean system, a complex division of labor, which includes specialized roles for workers of different sizes, ensure that the colony functions efficiently.

Which choice best corrects the underlined word to maintain proper subject-verb agreement?

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Answer: ensures

Answer

The correct verb form is the singular, present-tense 'ensures' to agree with the singular subject 'division'.
The true subject of the clause is the singular noun 'division'. The plural nouns 'roles', 'workers', and 'sizes' are part of an intervening relative clause and do not affect the subject's number. Therefore, the singular verb 'ensures' is required. Since the rest of the passage is in the present tense ('serves', 'functions'), the present-tense form 'ensures' maintains the correct tense consistency.

Step-by-Step Solution

1
Identify the subject of the clause.
The subject is 'division', which is a singular noun.
The intervening phrase 'of labor' and the relative clause 'which includes specialized roles for workers of different sizes' contain plural nouns ('roles', 'workers', 'sizes') but do not change the singular nature of the main subject 'division'.
2
Determine the correct verb tense and number.
The verb must be singular to match the singular subject 'division', and it must be in the present tense to match the rest of the passage ('serves', 'functions').
Subject-verb agreement requires singular subjects to pair with singular verbs, and the overall context of the passage is in the present tense.
3
Evaluate the choices to find the match.
The form 'ensures' is singular and present tense, matching the subject 'division'.
This resolves the grammatical error without introducing tense inconsistency or other errors.

Key Concept

Subject-Verb Agreement
Question 64Question →

The sentence below contains a blank. Which form of the verb 'to reveal' correctly completes the sentence while maintaining proper subject-verb agreement in the present tense? Write the correct verb form in the blank.

Fill in the blanks below

A detailed analysis of the geological core samples, including layers of volcanic ash and ancient sediment, a history of seismic activity in the region.
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Answer

reveals
The correct verb form is 'reveals' because the subject of the sentence is the singular noun 'analysis'. The long phrase separating the subject from the verb contains plural nouns like 'samples' and 'layers', but these do not affect the grammatical number of the subject. A singular subject requires a singular verb, which in the present tense ends in -s.

Step-by-Step Solution

1
Identify the true grammatical subject of the sentence.
The subject is the singular noun 'analysis'.
The prepositional phrase 'of the geological core samples' and the participial phrase 'including layers of volcanic ash and ancient sediment' are intervening modifiers that describe the subject but do not change its singular number.
2
Determine the correct present-tense form of the verb 'to reveal' that agrees with a singular subject.
The correct form is 'reveals'.
A singular third-person subject ('analysis') requires the singular verb form ending in -s in the present tense.

Key Concept

Subject-Verb Agreement with Intervening Phrases
Estimated Time:1m 0s
Question 65Question →

In modern city planning, the design of sustainable skyscrapers helps reduce a city's carbon footprint. The vertical gardens on these structures, in addition to acting as a natural air filter, creates a cooling effect in dense urban areas.

Which of the following is the correct form of the bolded word 'creates'?

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Answer: create

Answer

create
The correct answer is the plural present-tense verb 'create' because it agrees with the plural subject 'gardens'. The intervening phrases 'on these structures' and 'in addition to acting as a natural air filter' separate the subject from the verb but do not change the subject's plural nature.

Step-by-Step Solution

1
Locate the subject of the clause containing the bolded verb.
The subject is the plural noun 'gardens'.
The prepositional phrase 'on these structures' and the parenthetical phrase 'in addition to acting as a natural air filter' are intervening modifiers and do not affect the number of the subject.
2
Match the verb form to the plural subject 'gardens' to ensure subject-verb agreement.
The verb must be in its plural present-tense form, which is 'create'.
Plural subjects require plural verbs (e.g., 'gardens create'), whereas singular subjects require singular verbs (e.g., 'garden creates').
3
Check the surrounding context to verify tense consistency.
The first sentence uses the present-tense verb 'helps', confirming that the paragraph is written in the present tense.
To maintain tense consistency, the verb should remain in the present tense rather than shifting to the past tense.

Key Concept

Subject-Verb Agreement with Intervening Phrases
Question 66Question →

A team of researchers is translating a report on Mesoamerican excavations. Read the passage and determine which present-tense form of the verb 'to offer' correctly completes the sentence. Which present-tense form of the verb 'to offer' correctly completes the sentence to ensure proper subject-verb agreement?

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Archaeologists studying Mesoamerican civilizations have recently uncovered a significant site. The discovery of a hidden chamber in the ancient Mayan temple, along with various jade artifacts, new insights into classical period trade routes.
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Answer

The correct answer is 'offers' because the singular subject 'discovery' requires the singular present-tense verb form.
The subject of the verb is the singular noun 'discovery'. The intervening prepositional phrases 'of a hidden chamber...' and the parenthetical prepositional phrase 'along with various jade artifacts' do not make the subject plural. A singular subject requires a singular verb form. Therefore, the singular present-tense verb 'offers' is the correct choice.

Step-by-Step Solution

1
Identify the subject of the clause containing the blank.
The subject is the singular noun 'discovery'.
The noun 'discovery' is the head of the noun phrase that functions as the subject of the sentence.
2
Determine if the subject is singular or plural, ignoring any intervening prepositional or parenthetical phrases.
The subject 'discovery' is singular. The phrases 'of a hidden chamber...' and 'along with various jade artifacts' are intervening modifiers and do not affect the number of the subject.
Phrases starting with 'along with' or prepositions do not create a compound subject.
3
Match the singular subject with the correct present-tense form of the verb.
The correct singular present-tense form is 'offers'.
A singular subject requires a singular verb, which ends in '-s' in the present tense.

Key Concept

Subject-verb agreement with intervening prepositional and parenthetical phrases.
Question 67Question →

The unique hunting strategy of the archerfish has long fascinated marine biologists. Operating in the brackish waters of mangrove swamps, this remarkable predator, in order to capture prey, shoots a jet of water from its mouth to knock insects off overhanging branches. The force of these aquatic projectiles, in addition to the fish's highly specialized eyesight, allow it to target and hit insects with remarkable precision from several feet away.

Which of the following options is the correct form of the underlined verb to complete the sentence?

Show answer & explanation

Answer: allows

Answer

allows
The correct option is 'allows' because the subject of the verb is the singular noun 'force'. The prepositional phrase 'of these aquatic projectiles' and the parenthetical phrase 'in addition to the fish's highly specialized eyesight' are intervening elements that do not change the grammatical number of the subject. A singular subject requires the singular present-tense verb 'allows' to maintain subject-verb agreement.

Step-by-Step Solution

1
Locate the verb in question and trace back to find the grammatical subject of the clause.
The verb is 'allow' (or its variants), and the potential subjects in the sentence are 'force', 'projectiles', and 'eyesight'.
Finding the true subject is necessary to determine whether the verb should be singular or plural.
2
Identify and temporarily cross out any intervening prepositional phrases or parenthetical expressions that separate the subject from the verb.
The prepositional phrase 'of these aquatic projectiles' and the parenthetical phrase 'in addition to the fish's highly specialized eyesight' are crossed out, leaving the singular noun 'force' as the true subject.
Intervening phrases describe or add information to the subject but do not change its grammatical number.
3
Determine the correct verb form that agrees in number with the singular subject 'force' and matches the present-tense context of the passage.
The singular present-tense form 'allows' is selected.
A singular subject requires a singular verb, and the surrounding sentences establish a present-tense context ('has', 'shoots').

Key Concept

Subject-verb agreement with intervening prepositional and parenthetical phrases
Question 68Question →

Read the sentence below. Which present-tense form of the verb 'to provide' correctly completes the sentence to maintain proper subject-verb agreement?

Fill in the blanks below

The detection of gravitational waves from colliding neutron stars astrophysicists with a new method for measuring the expansion rate of the universe.
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Answer

provides
The correct verb form is the singular present-tense 'provides' because the subject of the sentence is the singular noun 'detection'. The intervening prepositional phrases 'of gravitational waves' and 'from colliding neutron stars' contain plural nouns, but they do not affect the agreement of the main verb with the singular subject.

Step-by-Step Solution

1
Identify the true subject of the sentence.
The subject is the singular noun 'detection'.
The prepositional phrases 'of gravitational waves' and 'from colliding neutron stars' modify the noun but do not change the subject of the sentence.
2
Determine the verb form that agrees with the singular subject in the present tense.
The correct verb form is the singular present-tense 'provides'.
A singular subject requires a singular verb form to maintain correct agreement.

Key Concept

Subject-verb agreement with intervening prepositional phrases
Estimated Time:45s
Question 69Question →

Read the passage below:

Deep within the archives of the museum, a team of conservators works tirelessly to protect ancient artifacts. The preservation of these fragile silk scrolls, which requires a highly stable climate-controlled environment, demand meticulous attention to detail. Every fluctuation in humidity could cause irreparable damage.

Which of the following choices represents the correct form of the underlined word to maintain grammatical agreement in the sentence?

Show answer & explanation

Answer: demands

Answer

The correct choice is 'demands' because the singular subject 'preservation' requires the singular, present-tense verb 'demands' to maintain proper subject-verb agreement.
The correct verb form is the singular, present-tense 'demands' because the subject of the sentence is the singular noun 'preservation'. The plural noun 'scrolls' within the intervening prepositional phrase does not affect the agreement of the main verb.

Step-by-Step Solution

1
Locate the subject of the clause containing the underlined verb.
The subject is the singular noun phrase 'The preservation'.
Identifying the head noun of the subject phrase determines whether the verb must be singular or plural.
2
Identify any intervening modifiers that might distract from the true subject.
The prepositional phrase 'of these fragile silk scrolls' and the relative clause 'which requires a highly stable climate-controlled environment' separate the subject 'preservation' from the verb.
Intervening elements often contain plural nouns (like 'scrolls') that can be mistaken for the subject.
3
Match the singular subject with the correct present-tense verb form.
The singular verb 'demands' is required to agree with 'preservation'.
The passage is written in the present tense ('works', 'requires'), so the verb must also be in the present tense.

Key Concept

Subject-Verb Agreement with Intervening Phrases
Estimated Time:1m 0s
Question 70Question →

The following passage describes a challenge in modern astronomy. What is the correct present-tense form of the verb 'to explain' that completes the passage to maintain proper subject-verb agreement?

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In the field of astronomy, researchers constantly analyze anomalies in the night sky. Neither of the proposed mathematical models the strange orbital decay observed in the outer rings of Saturn. Consequently, astrophysicists must continue to refine their hypotheses to account for this data.
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Answer

The correct answer is 'explains'.
The verb must agree in number with its subject, which is the singular indefinite pronoun 'Neither'. The correct present-tense form for a singular subject is 'explains'. The intervening prepositional phrase 'of the proposed mathematical models' contains the plural noun 'models', but nouns within modifying prepositional phrases do not affect subject-verb agreement.

Step-by-Step Solution

1
Identify the subject of the verb in the sentence containing the blank.
The subject is the indefinite pronoun 'Neither'.
The prepositional phrase 'of the proposed mathematical models' modifies the subject but does not change it; the head of the subject phrase is the pronoun 'Neither'.
2
Determine the number of the subject to establish agreement.
The subject 'Neither' is singular.
Indefinite pronouns such as 'each', 'either', and 'neither' are singular and require singular verbs.
3
Form the correct present-tense verb that agrees with the singular subject.
The correct present-tense form is 'explains'.
For a singular subject in the third person, the verb must end in '-s' (explains) to agree with the subject 'Neither'.

Key Concept

Subject-Verb Agreement with Indefinite Pronouns
Estimated Time:1m 0s
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