Question

Fill in the blank with an appropriate option:

I'm afraid I can't come tomorrow. I _________ work late.

• A. have to
• B. has to
• C. had to
• D. had

Answer 1

The correct option is A have to

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 A is the correct answer because it expresses strong certainty and assurance which facilitates well in the given sentence.

Whereas option A contains the word "has" and is not applicable with first person "I";

Option C contains the word " had" which is the past form of the verb therefore it can't be fitted in the present tense;

option D is incorrect because of the same reason as option C and also in past perfect tense had is followed by past participle, which is not present in the given sentence.