英语专业四级辅导：词汇与语法全真模拟练习32

会计考友

从今天开始我们要专攻助动词。好啦，现在大家先来回忆一下助动词有哪一些？
　　助动词包括：be (is, am, are, was, were, been, being)；have (has, had, having)；do (does, did)；shall (should), will (would)
　　" be + 动词不定式"可以表示下面几种意思:
2 F9 s8 U& K5 F2 x- O/ O　　1.命令或指示。例如：
4 A4 v) c2 d2 t& M　　No one is to enter the room without permission.
　　2.计划或安排。例如：
　　A new bridge is to be built over the river soon.
　　3.可能。例如：
　　This kind of tree is to be found in that forest.
　　4.应该。例如：
　　Such people are to be criticized.
& q4 A% W0 V# X6 M/ Y6 U) _　　5.表示后来发生的事，可以用来表示一种命运。例如：
　　They said good-bye, little knowing that they were never to meet again.
& V: o0 |1 V& z3 |! ]$ V　　Task:这一期你的任务一:仔细观察下面三个句子,指出各个句子中的＂be+动词不定式＂是上面五种意义的那一种。
　　1.The books are not to be taken out of the reading-room.
　　2.The expedition is to start in a week’s time.
: e. J* W& N+ w3 P* b1 h/ X% r　　3.He was to regret the decision.