英语复习：语法三大从句总结(3)

　　If ---如果

　　If you don’t hurry up, you will miss the plane.

　　Unless --- 如果不, 除非=if not

　　We can’t get there on time unless we book the earliest flight

　　As long as --- 只要

　　We will succeed as long as we keep on trying.

　　As (so) far as --- 据……所知

　　As far as I know, he speaks English very well.

　　In case --- 假使, 如果

　　The plane cannot take off in case it rains.

　　Provided that 如果,有时省略 that

　　The plane will be in good condition provided that it is taken care of carefully.

　　On condition that --- 条件是…

　　He said that he would come to the meeting on condition that no one asked him to speak.

　　注:主从句的动作发生在将来时，则主句用将来时, 从句用一般现在时。

　　If he arrives tomorrow, I will be waiting for him at the airport.

　　3. 地点状语从句

　　地点状语从句只有两个连词: Where, wherever

　　Where --- 在……地方

　　Where there is a will, there is a way.

　　Wherever --- 无论哪里

　　Wherever you are, I will be right there waiting for you.

　　4. 原因状语从句

　　because, as, since, now that, 和considering that, seeing that 这六个连词都用于表示表示原因, 但在语气上一个比一个弱.

　　Because --- 因为,通常从句放在主句后.

　　Mr Smith was very upset because he couldn’t find his luggage.

　　As --- 因为, 通常放在句首

　　As he is honest and modest, all his friends like him.

　　Since ---既然  因语气较弱, 常译为既然(众所周知的原因)

　　Since everybody has come, we can set off.

　　Now that --- 既然

　　Now that you are here, you can join us.

　　considering that --- 顾及到

　　Considering that they are just beginners, they are doing quite a good job.

　　seeing that --- 由于

　　Seeing (that) quite a few people were absent, we decided to put the meeting off.

　　5. 结果状语从句

　　引导结果状语从句的连词有：that, so that, so…that…

　　such…that  So… that --- 太……以至于 so 后面应用形容词或副词, 有时省略so只用that

　　Boeing 747 is so large that people like to call it jet bomb喷气炸弹.

　　So that --- 因而，以便，为了 有时so 可以省去

　　Speak louder please so that the people at the back can hear you.

　　Such …that… ---太……以至于  用法与so…that相同，但such 后面应用名词。

　　The foreign visitor was such a fast speaker that nobody could understand him.

　　6. 目的状语从句

　　引导目的状语从句的主要连词有: that, so that, in order that, for fear that, lest

　　(So) that --- 以便, 从句中常常使用一些情态动词，如：can, could, may, might, should等

　　Let’s take the front seats (so) that we may see more clearly.

　　in order that --- 为了, 与so that  相同从句中常常使用一些情态动词，如：can, could, may, might, should等

　　School was closed early in order that the children might go home ahead of the storm.

　　for fear that --- 生怕; 为了防止(某事发生)

　　He took the name down for fear that he should forget it.

　　in case  --- 万一

　　You should bring a dictionary in case you need it.

　　Lest --- 以防万一

　　The man decided to tell his boss the fact lest he would be angry with him.

　　7.  让步状语从句

　　引导让步状语从句的连词有：Although, though, as, even if, even though, no matter, however, whatever, while, whether.

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