单招英语必背知识点汇总-重要知识整理思维导图

表示时间的状语从句可由when, as, while, whenever, after, before, till (until), since, once, as soon as (或the moment ), by the time, no sooner … than, hardly (scarcely) … when, every time等引导。

e.g. When I came into the office, the teachers were having a meeting.

原因状语从句是表示原因或理由的，引导这类从句的最常用的连词是because, since, as , now that(既然)等，for 表示因果关系时(它引导的不是从句)为并列连词，语气不如because强。

e.g. He is disappointed because he didn't get the position.

引导地点状语从句的连词是where 和wherever等。

e.g. Sit wherever you like.

引导目的状语从句最常用的词(组)是so, so that(从句谓语常有情态动词), in order that, in case(以防，以免)等。

e.g. Speak clearly, so that they may understand you.

结果状语从句是表示事态结果的从句，通常主句是原因，从句是结果。由so that (从句谓语一般没有情态动词), so … that, such … that等引导。

e.g. She was ill, so that she didn’t attend the meeting.

条件状语从句分真实性(有可能实现的事情)与非真实性(条件与事实相反或者在说话者看来不大可能实现的事情)条件句。引导条件状语从句的词(组)主要有if, unless, so (as) long as, on condition that, so (as) far as, if only ( = if )。注意：条件从句中的if 不能用whether替换。

e.g. If he is not in the office, he must be out for lunch.

说过只可使用past，多说多练牢牢

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