第1个回答 2013-10-21
一、so that引导目的状语从句时，表示“以便；为了”，从句中常使用can /could /may /might /will /would /should等情态动词或助动词；引导结果状语从句时，从句中一般不用can和may等词，在so that前可以用逗号，意思是“因此;所以”。如：
1. The little boy saved every coin so that he could buy his mother a present on Mother's day.
2. She bought a digital camera online so that she would save a lot of time.
二、so＋形容词或副词＋that ...引导结果状语从句。
(一)so＋形容词或副词＋that ...引导的肯定的结果状语从句，意思是“如此……以致于……”。如：
1. ---What a fine day it is today! ―Yes,the sunshine is so beautiful that I'd like to go swimming in the sea.
2. When the football fans saw Beckham, they got so excited that they cried out.
(二)so＋形容词或副词＋that ...引导的否定的结果状语从句，意思是“如此……以致于不能……”。如：
1. The camera is so expensive that I can't afford it.
2. Miss Gao asked a question, but it was so difficult that nobody could answer it
注意：当that引导的结果状语从句为肯定句时，so ... that ...可以与be ... enough to do转换；当从句为否定句时，可以与too ... to ... 或be not ... enough to do转换。如：
1. David was so careless that he didn't find the mistakes in his test paper. ---- David was too careless to find the mistakes in his test paper.
2. A：The boy is so young that he can't look after himself. --The boy is not odl enough to look after himself
so ... that ... 引导结果状语从句有时候可以与such ... that ...句型相互转换。如：
9. The stone is so heavy that I can't lift it up. It is such a heavy stone that I can't lift it up.