Fill in the blank with the most appropriate word.
No matter what he said to his girlfriend, she ____ listen to him.
The modal verb “would/wouldn’t” (negative form contraction of would not) is used to refer
to typical habitual actions and events in the past. In the given
context, the reference is to his girlfriend not being in the habit of listening
to him. Thus, “wouldn’t” is the correct answer.
“Isn’t” in option A is a contraction of “is not” and is used in situations that
deal with the present. The context refers to a habitual action in past and this
option does not concur with the sentence.
“Wasn’t” in option B is a contraction of “was not” and is used to indicate the first person
singular (I) and the third person singular (he, she, it), thus this is
incorrect in this context.
“Couldn’t” in option C is the contraction of could not and is used to indicate
an inability in the present and the future.
Thus, option D is the correct answer.