1、引導目的狀語從句時,表示“以便；為了”,從句中常使用can/could/may/might/will/would/should等情態(tài)動詞或助動詞；引導結(jié)果狀語從句時,從句中一般不用can和may等詞,在so that前可以用逗號,意思是“因此;所以”.如：
The little boy saved every coin so that he could buy his mother a present on Mother's day.
小男孩存了每一個硬幣，以便在母親節(jié)給母親買禮物。
2、so...that..，so＋形容詞或副詞＋that...引導結(jié)果狀語從句.意思是“如此……以致于……”.如：
When the football fans saw Beckham,they got so excited that they cried out.
當球迷看到貝克漢姆時，他們激動得哭了起來。