作者:城市网 来源:城市网学院 更新日期：2013-3-6
I demand/insist that …
结构︰主词1+意志动词（demand/insist 等）+（that）+主词2+（should）+原形动词
说明︰意志<动词>有四类：建议（suggest，re#mend，propose，advise，urge 等），要求（desire， ask，demand，require，request，maintain，insist 等），命令（order，#mand 等），规定（ rule，regulate，stipulate 等）。其後接 that-<子句>时，该<子句>里的<动词>要用原形或“should+<动词>”。美式英语通常省略 should。
The #mittee moved that the meeting （should） be adjourned. 委员提议休会。
His parents demanded that he （should） be back by ten. 他的父母要求他十点以前回家。
The employees demand that their salaries be raised. 员工们要求加薪。
They ruled that the law （should） not be imposed. 他们规定不应加重法律。
His father ordered that he （should） keep a diary in English.
他的父亲规定他要用英文写日记。
My mother encouraged me and insisted that I continue my education.
我妈妈鼓励我，而且坚持我应该继续我的教育。
He insisted that I （should） apologize to her. 他坚持我应该向她道歉。
Recently, many states have insisted that high schools teach students how to drive.
最近，许多州坚持中学应该教学生如何开车。
His father insisted that they （should） move to the country. 他爸爸坚持他们应该搬到乡下。
It is proper … that …
结构︰It is+意志形容词（important 等）+（that）+主词+（should）+原形动词
说明︰意志<形容词>包括 important，necessary，imperative，essential，urgent，desirable， advisable，re#mendable，proper 等。that-<子句>中只能用<助动词> should，不可用 must，而 should 往往予以省略。
It is necessary that he （should） sort out the information for my reference.
他有必要整理些资料供我参考。
It is essential that he get up early. 他有必要早起。
It is urgent that food and clothing （should） be sent to the sufferers.
急需将食物和衣服送给灾民。
It is desirable that we （should） provide for the poor at Christmas.
在圣诞节施舍穷人是可喜的事。
It is important that he be quiet. 他该保持安静是有必要的。
It is important that he not do it. 他不该做那事是有必要的。
It is requested that all members be present at the party. 全体会员都被要求出席这次晚会。
It is proper that such a bad man be punished severely. 这麽坏的人受重罚是应该的。
Imperative Sentence + Conj. + Main Clause
结构︰祈使句+连接词+主句
说明︰<祈使句>表示须具备的条件，主句表示可能的结果。<祈使句>代替 if 子句进行评说，提出要求，订立协议，提供建议或威胁等。<祈使句>的用法比 if 子句表示的更为紧迫。
Provide the materials and we'll do the job. 提供材料，我们就做这活。
Stop shouting or you'll wake up the neighbors. 不要喊了，否则你会把邻居吵醒的。
Put that down or else I'll smack you. 把它放下，不然我就揍你。
Be there on time, otherwise you'll create a bad impression.
要准时来，否则你会给人一个坏的印象。
Fail to pay and they'll cut off the electricity. 你（如果）不付款，他们就要断电。
Stop eating sweets, or you won't get any dinner. 你如果不停止吃糖，你就不要吃饭。
Unless …
结构︰Unless+子句，主要子句
说明︰此句型意为“除非…”。unless 引导一个否定假设句，相当於 if … not …，有时可以互换使用。总体上看，unless 的语气强於 if … not …，而且有时较为常用，例如在最後通牒中。
Unless you change your mind （=If you don't change you mind）， I won't be able to help you.
除非你改变你的想法，否则我不能帮助你。
Unless the management improves their offer, there'll be a strike.
除非资方做出进一步的建议，否则将举行罢工。
I couldn't have got to the meeting on time - unless I had caught an earlier train.
我不可能及时赶到会场，除非我赶上了较找的一班火车。
Provided/Providing （that） …
结构︰Provided/provided（that）+子句，S+V …
说明︰此句型意为“如果…”。Provided/Providing （that） 引导假设条件句，其功能相当於 if。
Provided/Providing （that） you clear your desk by this evening, you can have tomorrow off.
如果你到今晚把手头上的工作做完，你明天就可以休息。
As/So long as …
结构︰As/So long as +子句，S+V …
说明︰此句型意为“如果…，只要…”。As/So long as引导一个条件假设句，其功能相当於 if。
So （As） long as you clear your desk by this evening, you can have tomorrow leave.
如果你到今晚把手头上的工作做完，你明天就可以休息。
As long as you drive carefully, you will be very safe. 如果你开车小心，你就会很安全。
You may eat anything, so long as you don't eat too much.
只要不吃得太多，你可以吃任何东西。
As long as live, I will help you. 只要我活着，我都会帮助你。
As long as you don't betray me, I'll do whatever you ask me to （do）。
只要你不出卖我，要我做什麽我都愿意。
We'll ship the goods at an early time as long as there is a steamer.只要有船，我们就尽早装货。
You will never be good students so long as you goof around.
如果你们成天游手好闲，就永远也成不了好学生。 [本文共有 2 页，当前是第 1 页] <<上一页 下一页>>
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