Reading & Writing · Expression of Ideas and Standard English Conventions

Form, Structure, and Sense

Explanation

Form, Structure, and Sense questions give you a short sentence or two with a blank, followed by the prompt “Which choice completes the text so that it conforms to the conventions of Standard English?” 

These questions test four related grammatical conventions: subject-modifier placement (an introductory modifying phrase must be followed immediately by the specific noun it logically describes, not by a different noun or the filler word “there”); finite vs. non-finite verb forms (deciding whether a full, conjugated verb or a participle/infinitive is grammatically required in a given slot); subject-verb agreement and tense consistency (matching a verb’s number to its true subject, even when other nouns intervene, and matching its tense to the surrounding context, usually the simple present for general facts); and possessive nouns and determiners (choosing the correctly numbered possessive form—singular or plural—and making sure any determiner such as “its” or “their” agrees with it).

In every case, the correct choice is the one that is both grammatically correct and logically consistent with the rest of the sentence.

Example 1

Abandoned for nearly a century after a devastating fire, ______ was fully restored and reopened to the public in 2015.
Which choice completes the text so that it conforms to the conventions of Standard English?
A
the old lighthouse
B
there was a landmark that
C
local preservationists
D
the restoration project
Choice A is the best answer. The convention being tested is subject-modifier placement. This choice places the noun phrase “the old lighthouse” immediately after the modifying phrase “abandoned for nearly a century after a devastating fire,” clearly establishing that the lighthouse—not another noun in the sentence—was the thing abandoned. Choice B is incorrect because it results in a dangling modifier. The placement of the function word “there” immediately after the modifying phrase illogically suggests that “there” was abandoned after a fire. Choice C is incorrect because it results in a dangling modifier. The placement of “local preservationists” immediately after the modifying phrase illogically suggests that the preservationists, not the lighthouse, were abandoned after a fire. Choice D is incorrect because it results in a dangling modifier. The placement of “the restoration project” immediately after the modifying phrase illogically suggests that the project itself was abandoned for a century, when the project could not have existed until after the lighthouse was already abandoned.

Example 2

A thermostat is a simple device found in most homes. This device ______ the temperature of a room and adjusts heating or cooling systems accordingly.
Which choice completes the text so that it conforms to the conventions of Standard English?
A
monitors
B
had monitored
C
will have monitored
D
would have been monitoring
Choice A is the best answer. The previous sentence describes what a thermostat generally is, and this sentence describes a general fact about what the device does, matching the simple present tense of the verb “adjusts” later in the same sentence. The simple present tense form “monitors” is required to express this general fact. Choice B is incorrect. This choice uses the past perfect tense, but the sentence describes what the device currently and generally does, so the past tense doesn’t make sense here. Choice C is incorrect. This choice uses the future perfect tense, but the sentence describes a present, ongoing fact, so the future tense doesn’t make sense here. Choice D is incorrect. This choice uses the conditional perfect continuous tense, but the sentence describes a present, ongoing fact, so this tense doesn’t make sense here.

Tips for solving

  1. When a sentence opens with an introductory modifying phrase, find the noun that logically performed or experienced that action, and make sure it—not “there” or some other noun—comes immediately after the comma.

    Example: After spending decades analyzing ancient sediment cores from the Arctic Ocean, ____

    • Incorrect Choice: there were several groundbreaking discovery papers published by the climatologist. (The noun immediately after the comma is "there," which cannot analyze sediment cores).

    • Correct Choice: the climatologist published several groundbreaking discovery papers. (The noun "the climatologist" logically performed the action of spending decades analyzing cores).

  2. If an introductory phrase is followed by a noun that couldn’t logically have done what the phrase describes, the sentence contains a dangling modifier and that choice is wrong.

    Example: Using advanced satellite radar to penetrate dense jungle canopy, ____

    • Incorrect Choice: ancient Maya ruins were mapped by a team of archaeologists. (The "ruins" couldn't logically use satellite radar).

    • Correct Choice: a team of archaeologists mapped ancient Maya ruins. (The "team of archaeologists" logically used the satellite radar).

  3. Check whether the blank needs to be the sentence’s only main verb (which must be finite) or whether it forms a supplementary phrase alongside another main verb elsewhere in the sentence (which requires a non-finite participle instead).

    Example: The new solar-powered water filtration system, ____ by engineers to operate in remote areas, provides clean drinking water to over 5,000 residents daily.

    • Main Verb Check: The sentence already has a main verb later on ("provides"). Therefore, the blank needs a non-finite participle modifier, not a second main finite verb.

    • Incorrect Choice: was designed (A finite verb that creates a fragmented or double-main-verb error).

    • Correct Choice: designed (A non-finite participle that forms a supplementary descriptive phrase).

  4. For subject-verb agreement, identify the true subject of the verb and ignore any nouns in prepositional phrases or other modifiers that sit between the subject and the verb.

    Example: The collection of rare manuscripts, which includes several medieval scrolls and illuminated letters from European monasteries, ____ preserved in a climate-controlled vault.

    • Subject Identification: The true subject is the singular noun "collection" (ignore the plural modifier "of rare manuscripts").

    • Incorrect Choice: are (Plural verb erroneously agreeing with "manuscripts").

    • Correct Choice: is (Singular verb correctly agreeing with "collection").

  5. For general facts, definitions, and things that are still true today, use the simple present tense; watch out for needlessly complex tenses like the past perfect, future perfect, or conditional perfect that don’t match the surrounding context.

    Example: Photosynthesis is the biological process by which green plants ____ sunlight into chemical energy to fuel their growth.

    • Context Check: This describes a timeless scientific definition/general fact, requiring simple present tense.

    • Incorrect Choice: had been converting (Unnecessarily complex past perfect tense).

    • Correct Choice: convert (Simple present tense).

  6. For possessives, first decide whether the owner is singular or plural, then make sure both the possessive noun (dog’s/dogs’) and any possessive determiner (its/their) agree with that number.

    Example: To protect ____ territory from encroaching predators, a pack of wolves relies on vocal howls and scent markings along ____ boundary lines.

    • Owner Check: The owner is "a pack" (singular noun acting as a single unit). Therefore, both the possessive noun and possessive pronoun must be singular.

    • Incorrect Choice: its... their (Mixes singular and plural determiners).

    • Correct Choice: its... its (Consistently uses singular possessive forms to match "a pack").

Practice questions

00:00
Question 1 · easy
The chemical reaction that ______ when baking soda is mixed with vinegar produces carbon dioxide gas.
Which choice completes the text so that it conforms to the conventions of Standard English?
Question 2 · easy
Marie Curie’s notebooks remain radioactive to this day. Even now, ______ pages must be handled with protective equipment by researchers who wish to examine them.
Which choice completes the text so that it conforms to the conventions of Standard English?
Question 3 · easy
The tiny hair-like structures that ______ along the surface of a paramecium’s cell help propel the organism through water.
Which choice completes the text so that it conforms to the conventions of Standard English?
Question 4 · easy
Meteorologists rely on an instrument called an anemometer to measure wind conditions. This device ______ wind speed by counting the rotations of its spinning cups each minute.
Which choice completes the text so that it conforms to the conventions of Standard English?
Question 5 · easy
A hive of honeybees operates as a single, coordinated unit. ______ survival depends on thousands of individual bees working together toward common goals.
Which choice completes the text so that it conforms to the conventions of Standard English?
Question 6 · easy
After months of public debate on the new transit line, the city council ______ the proposal.
Which choice completes the text so that it conforms to the conventions of Standard English?
Question 7 · easy
______ near the surface of shallow tide pools, sea anemones capture small fish and shrimp using their stinging tentacles.
Which choice completes the text so that it conforms to the conventions of Standard English?
Question 8 · easy
Built over 2,000 years ago, ______ across northern China for thousands of miles.
Which choice completes the text so that it conforms to the conventions of Standard English?
Question 9 · easy
A blue whale’s heart weighs nearly 400 pounds. ______ enormous size allows it to pump blood through the animal’s massive circulatory system.
Which choice completes the text so that it conforms to the conventions of Standard English?
Question 10 · easy
A collection of ancient manuscripts ______ housed in a climate-controlled vault beneath the university library.
Which choice completes the text so that it conforms to the conventions of Standard English?