Question

He ________ vacate the room immediately.

Answer 1

Answer:

he is Vacate the room immediately.

is the answer..

Answer 2

He has to vacate the room immediately.

• Here 'has to' describes that the person should do something as it is necessary for him to do, here to vacate the room and that could be evident from the word 'immediately'.
• For describing third person singular, 'has to' is used.
• 'Have to' and 'has to' are basically called a modal verb which is used in the sentence which is affirmative.