"be + 不定式"结构

　　一、表示"将来的安排，将来的计划，按计划或安排将要发生的事情

　　I'm to have tea with Betty this afternoon. 今天下午我将与贝蒂一起喝茶。

　　The train is to arrive in Xuzhou at 10:25 a.m.. 这趟火车将于10：25到达徐州。

　　The children are to buy some new clothes for the coming Spring Festival. 春节将至，孩子门将买几件新衣服．

　　明天早晨八点我们将在校门口集合。

　　____________________________________________________________________.

　　二、表示"命令/指示、禁止、职责、义务、同意、决定、某事应当/必须如何做 ( = be to indicates something should / ought to be done)等 "

　　You are to call your mother to let her know you have safely arrived when you reach the destination.

　　You are to go to the hotel where rooms have already been booked for you. 你们就去旅馆，房间已经给你们订好了。

　　This door is not to be opened. 此门不得打开。

　　你所借的图书应当于7月5日前归还。The books you borrowed ______ ______ ______ ______ before July 5.

　　Ex.

1"You are _________ all your homework before you leave school," said the teacher.

　A. to finish B. finishing C. finished D. finish

2 Our TV sets sell well, but ten years ago no one could have imagined such a big share in the market that they __________.

A. were having B. had had C. were to have D. had

3. If you ________ be in time for the early bus, be sure to get up before five o'clock in the morning.

　A. are to B. are about to C. are going to D. are due to

4. In a room above the store, where a party _______, some workers were busily setting the table.

　A. was to be held B. has been held C. will be held D. is being held

5. He traveled to many mountain villages and saw many poor children out of school. This experience _______ his life.

A. would change B. had changed C. was to change D. was changing

　　This is not a family where bad behavior goes unpunished and you ... (pages 22 - 23, lines 28 - 29) 这个家可不是一个对不良行为听之任之的地方，而你......

　　go unpunished In the phrase go unpunished, go is a linking verb meaning 'be or remain in a particular and usually undesirable state'. 不受惩罚

go + 过去分词

Her decision went unchallenged. 她的决定未引起异议。

　　Her complaints went unnoticed. 他的抱怨未引起注意。

　　It is necessary not to let errors go uncorrected. 有了错误就必须纠正。

go 连系动词 "变，变成"，后多跟形容词作表语，表示主语由好变坏，或由正常情况变成特殊情况。还可以跟有关颜色的形容词。