6、结果状语从句:that, so that, so … that, such … that …
注意:so + 形容词/副词 + that从句;such + 名词 + that从句.
7、方式状语从句:as, as if(though)
I'll do as I am told to.
It looks as if it is going to rain.
8、比较状语从句:than, as
9、条件状语从句:if, unless, so (as) long as, in case, once, a far as, on condition that.
注意if与unless的区别:不能用and连接两个unless从句,即不能有… unless …,and unless … .但if … not and if … not却不受此限.
You won't lose your weight unless you eat less and unless you exercise more.(×)
但可以说 … unless you eat less and exercise more.
10、注意状语从句中从句的省略现象
(1)连接词 + 过去分词
Don't speak until spoken to.
Pressure can be incrased when needed.
Unless repaired, the washing machine is no use.
(2)连词 + 现在分词
Look out while crossing the street.
(3)连词 + 形容词/其他
常见的有it necessary、if possible、when necessary、if any等.
二、精典名题导解
选择填空
1. I don't think I'll need any money but I'll bring some ____________.
A.as last B.in case C.once again D.in time
解析:答案为B.句意为"带些钱以防万一",只能选择in case.引导的条件状语从句,后面省略了I should need it.
2. The WTO can't live up to its name _________ it doesn't include a country that is home to one fifth of man-kind.
A.as long as B.while C.if D.even though
解析:答案为C.本题考查状语从句的用法.句意为"假如世贸组织不包括占世界人口五分之一的中国的话,那它就名不副实".as long as语气过于强烈,while和even though不符合句意.
3、Someone called me up in the middle of the night, but they hung up_________I could answer the phone.
A.as B.since C.before D.until
解析:答案为C.题意为:半夜里有人打来电话,我没来得及就挂了.but暗示在接话前就挂了.