大学英语四级考前恶补--be+不定式结构.docVIP

be+不定式结构 Test Five be+不定式结构 表示按计划、安排即将发生的动作。例如： There’s to be an investigation. I am to have tea with Betty this afternoon. 这一结构常见于报纸和广播，用以宣布官方的计划或决定。例如： The Queen is to visit Japan next year. 二是表示命令、禁止或可能性等。例如： You are to stand here. Do you understand? Tell her she’s not to be back late. 一般现在时也可表达将来时间，常见于条件状 语和时间状语从句。例如： If she comes, I’ll tell her all about it. Wait here till the meeting is over. It won’t be long before the rain stops. ? 近义词辨析 ?begin, commence, initiate, launch, start  这组词均含有“开始”的意思。 在这组词中最常用，泛指开始做某事。但口语中近年来start用得较多。 The band began to play joyful music.乐队开始演奏欢快的音乐。 commence比begin用法正式。在宗教或其它仪式及军事用语中人们倾向用commence.  The officer ordered the soldiers to commence the attack.军官命令士兵开始进攻。 ?initiate指进程中的第一步，与何时停止或结束没有关系。 The government has initiated a new reform program.政府启动了新的改革方案。 launch指开始或着手一项活动、计划等大规模或声势浩大的行动，行动前或行动中有一定的宣传鼓动。  The company will launch an advertising compaign to introduce its new product.那个公司要发起广告攻势推出自己的新产品。 Start与stop构成反义用法，指从一特定地点出发，由静止或等待状态开始做某事。在口语中常可代替begin。  They started operations at once.他们马上开始行动。 ? 全真模拟试题 1. ______ in the past, at the moment it is? a favorite ?choice for wedding gown. A. Unpopular has as white been??  B. White has been as unpopular C. Unpopular has been as white??  D. Unpopular as white has been ? 2. ______ for a long time, the fields are all dried up. A. There has been no rain  B. Having no rain?  C. There having been no rain D. There being no rain ? 3. The millions of calculations involved, ______ by hand, would have lost all practical value by the time they were finished. A. had they been done??  B. they had been done??  C. having been done??  D. they were done ? 4. Televisions enable us to see things happen almost at the exact moment ______. A. which they are happening  B. they are happening??  C. which they happen??  D. they have happened ? 5. ______ me most was that the young boy who had lost both arms in an accident could handle a pen with his feet