A part of the following sentence is underlined. Choose the option that can replace the underlined part to improve the sentence. If you feel Options A, B, or C do not improve the sentence, then choose Option D: "No improvement required."
She didn't study for the test, so she was unable to answer most of the questions.
Show answer & explanation
Correct answer: D
Explanation
Correct Answer
No improvement required
Explanation
The given sentence is grammatically correct. The phrase "She didn't study for the test" uses the Simple Past Tense correctly. After the auxiliary verb "didn't," the base form of the verb "study" is used, so "didn't study" is the correct structure. The sentence clearly explains that her lack of preparation caused her inability to answer most questions.
The other options are incorrect. "She didn't studied" is wrong because "didn't" is already a past tense marker and must be followed by the base form of the verb. "She don't study" and "She doesn't study" are in the Simple Present Tense and change the meaning of the sentence.
Key Point
After auxiliary verbs like "did," "do," and "does," the main verb always remains in its base form. For example: "did not go," "does not play," and "do not work."