2）过去时常与具体的时间状语连用，而现在完成时通常与模糊的时间状语连用，或无时间状语。一般过去时的时间状语: yesterday, last week，…ago, in1980, in October, just now, 具体的时间状语...

一、 句法功能、表现形式不同定语从句分为限制性和非限制性两种。限制性定语从句不可缺少先行词，去掉它主句意思往往就不明确了，它与主句之间通常不用逗号分开；非限制性定语从句是对先行词的...

主要的有if, unless, as [so] long as等：You can leave now if you like. 如果你愿意现在就可以走了。As long as it doesn't rain we can go. 只要不下雨，我们就可以去。【注】除以上基本的引...

A Funny Memory 童真记趣Oh God! I think I was about seven and half when my sisters and I pulled this stupid stunt. I remember watching television with them and the show on happened ...

英语四级作文加分句型：表示采取措施 1.The government should take effective measures to cope with the current problems 2.Further efforts should be made to decrease the cost of produc...

「我愿意」这句话对美国人而言具有重大意义，它甚至可以改变你的生命，特是当你在自己的婚礼上说出这句话时，在婚礼中所发的誓言就如同签订契约一样，美国人并不是真把婚姻当作商业交易，但是，...

请下面这道题，逗号后面为什么用that而不用which？If a book is in English, _____ means slow progress for you.A. as B. which C. what D. that此题容易误选 A或B，想当然地根据空格前的逗号...

现在完成时的构成现在完成时由“have(has)+过去分词”构成。has 用于主语是第三人称单数时。（过去分词的构成P122—123中“动词的基本形式”）①I have just finished my homework. 我刚做完功...

在新托福写作考试中，托福写作的题目越来越抽象了，这就让考生一时之 间很难想到理由，所以写作质量也提不上来。那么考生将要如何才能克服这些问题呢?如果考生在直接面对这些题目的时候，如果一...

1. Typical of the grassland dwellers of the continent is the American antelope, or pronghorn. 2. Of the millions who saw Haley’s comet in 1986, how many people will live long enou...