when、while、as、as soon as、the moment、the minute、the second、the instant、immediately、directly、instantly、once、no sooner...than、hardly...when、scarcely...when、whenever、before、after、until、till、by the time、
when:动词是短暂性/延续性,动作同时/先后发生; while:动词是延续性(从句通常为be doing时态),动作同时发生;as:动作同时发生,表示①一边...一边...②随着时间的推移
短语类:as soon as、no sooner...than、hardly...when、scarcely...when;(一...就)名词类:the moment、the minute、the instant; 副词类:immediately、directly、instantly; time类:every time、each time、next time、by the time
连词no sooner...than、hardly...when、scarcely...when;(一...就) 用法
搭配
语态:hardly/scarcely/no sooner置于句首时,其后要进行部分倒装
时态:hardly/scarcely/no sooner+主语+had done......,when/when/than+主语+did
if、unless、in case(万一)、so/as long as(只要)、on condition that(在...条件下)、suppose/supposing/providing/provided/given that(假设、假定、如果、只要)
在时间状语从句、条件状语从句中,如果主句表达将来含义,从句用一般现在时(表将来)
as/although/though/while(尽管)、even though、even if、however/whatever/whoever/whenever/wherever/no matter what/no matter how/no matter when(无论...都...)、......
as/although/though/while用法区别
although:不倒装;though:可倒可不倒;as:一定倒装(n./adj./adv./分词/实义动词提前)
although、though不能与but连用,但可以与yet连用
while引导让步状语从句时,通常放句首,意为“尽管”
no matter+疑问词 和 疑问词+ever 的用法区别
however=no matter how;whoever=whoever;whenever=no matter when;wherever=no matter where
只能用疑问词+ever引导名词性从句
however/no matter how紧跟adj./adv+主谓
(如此...以至于)so...that、such...that;(结果是)so that
名词前many,much,few,little...修饰时,表达数量,用so
缺成分-定语从句
不缺成分-结果状语从句
先行词:人/物
关系词:作何种成分
从句是否缺成分
从句是否缺意思
连词辨析:意思、用法
主将从现
是否倒装/虚拟
because、as、since、now that、in that、seeing that、considering that
because:语气最强,回答why的原因(未知原因); since:语气较弱,(已知原因,放句首); as:语气次之,(已知原因,放句首)
now that:既然、由于; in that:既然、因为; seeing/considering that:鉴于...事实,考虑;
(正如,就像)as;(好像)as if、as though
so that(为了...、目的是...);in order that(目的是...);in case(免得、以防);for fear (that)(唯恐、生怕、以防);lest(唯恐、以防)...
so that和in order that引导目的状语从句时后常接may/should/could/would等情态动词
where、wherever、anywhere、everywhere
than、as(adv.)...as(conj.)、not so/as...as、the+比较级...