动词不定式短语:
1.It's time to do sth./It's time for sth 该做某事的时候了
eg:Now it's time to sing alone. 现在是独自唱下去的时候了。
2.can't wait to do sth. 迫不及待要做某事
eg:We can't wait to have a try. 我们等不及想要常试一下了。
3.Ask/tell sb. (not ) to do sth. 要求/告诉某人(不)做某事
4.Allow sb. to do sth. 允许某人做某事
5.Be supposed to do sth. 应该做某事
6.Would like/want (sb.) to do sth. 想要做某事