Question

Fill in the blank with a suitable modal auxiliary:
I _________ that coat if I were you.

• A. mustn't buy
  
• B. won't buy
  
• C. wouldn't buy
  
• D. can't buy
  

Answer 1

Answer: (C)

wouldn't buy

Modal Verbs show us the attitude of the speaker to what is being said or done. The term "modal" means expressing mood and mood is a way to express the attitude of the speaker.

Option C is the correct answer because it expresses uncertainty and according to the given sentence it facilitates with the mood of something in the past that didn't happen.

Whereas, option A expresses certainty regarding not performing the act;

option B expresses certainty regarding not buying it in the future;

option D expresses inability. Therefore these three options don't fit in the given question.