Question

Fill in the blank with the most appropriate word.
His parents don't allow him ___ after ten o'clock.

• A. Stay up
• B. To stay up
• C. Staying up
• D. Stayed up

Answer 1

The correct option is B To stay up

The infinitive verb is a verb with the word 'to' in front of it. This verb is always just a verb. There is no - ed, no - ing, no - s at the end of the verb. Thus, options A, C and D are wrong according to the rule. The correct option is B since 'to' is in front of the phrasal verb 'stay up'. Hence, sentence would become: His parents don't allow him to stay up after ten o'clock.