英语讲义【118】Be+不定式动词

　　上一期谈过了Be的语法功能，这期来看Be+不定式动词这个常见结构可表示哪些语义。

　　Be+不定式动词在不同情况下，可以表示很多种不同的语义。下面便是其中九种：

　　⒈表示坚决的命令。例如：　

　　1. This naughty boy is to stay here until the class is over.

　　2. No one is to enter this building without the permission of the security guard.

　　⒉表示计划或安排的事项。例如：　

　　3. Betty is to be married soon.

　　4. An insurance agent is to meet us this afternoon.

　　⒊表示可能性。例如：　

　　5. Are you to pay the debt for your wife?

　　6. The lovely puppy is nowhere to be found.

　　⒋表示意图或打算。例如：　

　　7. If you are to be there on time, you had better hurry.

　　8. If all of us are to remain friendly, we must be sincere with one another.

　　⒌表示应该。例如：　

　　9. You have done so well. You are to be rewarded.

　　10. Such nasty questions are to be avoided.

　　⒍表示不可避免。例如：　

　　11. Anne was wondering what was to become of her boy friend, Tommy.

　　12. The murderer was sentenced to life imprisonment and was never to see his family again.