istobedone是什么時(shí)態(tài)

　　A lot of work is to be done this week.

　　本周將有許多工作要做。

　　The question is what is to be done next.

　　問題是下一步該干什么。

　　I shall advise with my friends as to what is to be done.

　　至于該做些什么事，我會(huì)與朋友們協(xié)商好。