I know the boy _____ the teacher.[ ]

What will the weather be like tomorrow? — It ______ be rainy, cloudy or sunny. Who knows?

The teacher asked us to keep quiet.Which kind of structures does the sentence belong to?

The teachers ________________ the office for a few minutes when we arrived.

How do you look after your goldfish?—They need clean water, and remember not to _____ with your hands.