Question

It is used to be full of water​

Answer 1

Answer:

It used to be full of water.

Explanation:

Used to refers to something familiar or routine, as in "I'm used to getting up early for work," or to say that something repeatedly happened in the past like "we used to go out more." Use to typically occurs with did; "did you use to work there?" or "it didn't use to be like that," describing something in the past that ...