Question

I will mow the lawn, but only if I _____.


must to
had to
haven't to
have to

Answer 1

I will mow the lawn, but only if I have to.

• In English linguistics, the correct sentence structure, grammar and tense all are important to make a meaningful sentence.
• We do not use 'must to' in the sentence above as using must makes something obligatory which does not go along with the sentence.
• We do not use 'had to' as 'had' depicts an action in the past which is not in accordance with the sentence.
• 'Haven't to' doesn't go along with the sentence as it is not in accordance with the sentence.
• 'Have to' is the correct option to fill in the blank as it shows the the necessity of something. Also, it is the the option that goes along with the sentence.

Answer 2

Answer: had to

Explanation: