并列连词引导两个并列的句子。1) and 与or 判断改错： (错) They sat down and talk about something. (错) They started to dance and sang. (错) I saw two men sitting behi
连词是一种虚词， 它不能独立担任句子成分而只起连接词与词，短语与短语以及句与句的作用。连词主要可分为两类：并列连词和从属连词。并列连词
hardly/scarcely…when/before, no sooner…than 和as soon as都可以表示“一…就…“的意思，例： I had hardly / scarcely got home when it began to rain. I had no sooner got ho
此两个连词意义相同。肯定形式表示的意思是“做某事直至某时“，动词必须是延续性的。否定形式表达的意思是“直至某时才做某事“。动词为延续
1）as, when 引导短暂性动作的动词。 Just as / Just when / When I stopped my car, a man came up to me. 2）当从句的动作发生于主句动作之前，只能用when 引导这个从句
though, although 注意： 当有though, although时，后面的从句不能有but，但是 though 和yet可连用 Although it's raining, they are still working in the field.虽然在下雨，但
连接词主要有 if, unless, as/so long as, on condition that 等。.if 引导的条件句有真实条件句和非真实条件句两种。非真实条件句已在虚拟语气中阐述。 unless =
结果状语从句常由so… that 或 such…that引导，掌握这两个句型，首先要了解so 和 such与其后的词的搭配规律。比较：so和 such 其规律由so与such的不同词
表示目的状语的从句可以由that, so that, in order that, lest, for fear that, in case等词引导，例如： You must speak louder so that /in order that you can be heard by all. He wrot
比较：because, since, as和for 1） because语势最强，用来说明人所不知的原因，回答why提出的问题。当原因是显而易见的或已为人们所知，就用as或 since。