状语从句 状语从句中在复合句中作状语。根据句子的含义，可表示时间，地点，原因，目的，结果，条件，行为方式，比较，让步等。 时间状语从句： 1.When,while,as区别 相同 表示当。。。时候，主句为短暂性动作，从句为延续性动作 I met Laura when/while/as I was walking along the street. 不同 When+非延续性动词及延续性动词 While常与延续性动词或表示状态的动词连用，“与。。。同时” While my wife was reading the book I was watching TV. As表示“一边。。。一边。。。”随着。。。 He sang as he walked along. 2.表示一。。。就。。。短语类：as soon as scarcely…when hardly…when no sooner…than 名词类：the moment the minute the instant 副词类：immediately instantly directly Time类：every time next time by the time each time 3.scarcely…when hardly…when no sooner…than用法： 搭配 时态：主过完had done从过did 语序：位于句首时，后面要部分倒装（主倒从不倒，即把had提到主语之前） （二）条件状语从句 1.定义：在时间状语从句、条件状语从句中，主句表将来含义，从句一般现在时 2.连接词：if, unless,（除非）in case（万一）,so/as long as（只要）,on condition that（在。。。条件下）, supposing/suppose/provided/providing/given,（that）（假定，假设）once（一旦）;save that （只有。。。，除了。。。） （三）让步状语从句 1.连接词：as (倒装),though（可倒可不倒）,although（不倒装）,while(尽管)用于句首 例如：Although/Though he works hard, he makes little progress. Hard though/as he works, he makes little progress. 2.No matter+疑问词和疑问词+ever用法区别：都可引导让步状语从句，但只能用疑问句+ever引导名词性从句 例如：I believe whatever he said. （四）结果状语从句 1．So…that, such…that 例如：He is so clever that everyone likes him. He is such a clever boy that everybody likes him. So+adj./adv. Such+a/an+adj.+n.=so+adj.+a/an+n. Such+adj.+可数名词复数 注意：名词前many,much,few,little等修饰时，表达数量，用so (五)比较状语从句 标志词： than，as…as, not so/as...as, the+比较级。。。，the+比较级。。。 （六）原因状语从句 标志词： because, as, since,（因为） now that, in that（既然，由于） ,seeing/considering that，given that(鉴于，考虑到) （七）方式状语从句 标志词：as if/as though好像，仿佛；as正如，按照 (八)目的状语从句 标志词：so that(为了。。。；目的是。。。)，in order that（目的是）in case（以防）for fear(that),lest(唯恐，以防) 课后练习 单项选择 1._____ they visit the science museum, they showed great interest in everything they saw. A．At the first time B．For the first time C．At first D．The first time 2. We can’t go swimming _____ our parents are with us. It’s too dangerous. A．if B．when C．unless D．until 3. He has mountains of things to do, but I think he is talking _____ he had all the time in the world. A．even if B．so that C．if ever D．as though 4. He is still too young to do the job _____ we want it done. A．since B．while C．the way D．the moment 5. Language is so tightly woven into human experience _____ it is scarcely _____ to imagine life without it. A．that...impossible B．that...possible C．as...impossible D．as...possible 6. _____ the summer Mandarin program was supposed to be open to co ... ...
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