造句:1、It is +adj.+to do.2、It was +adj.+to do.3、It will be +adj.+to do.

问题描述:

造句:1、It is +adj.+to do.2、It was +adj.+to do.3、It will be +adj.+to do.

it is important to keep a balanced diet.
it was late to take the train yesterday.
it wil be boring to stay at home tomorrow.