作弊         1当今的校园里出现了各种各样的作弊手段。         2作弊的原因。     &nb...

1. because的用法A：Why didn't she come? 她为什么没来?B：Because she was very busy. 因为她很忙。It is because he is clever that I like him. 是因为他聪明我才喜欢他。2. since与as两者...

1.与现在事实相反的虚拟条件句条件状语从句 主句If +主语 +动词过去式 主语+ would, should, could, might+原形动词(be的过去式用were)例如：If I feared death, I wouldn't be a communist.（...

构成句子的各个部分叫做句子成分，句子成分有主要成分和次要成分。主要成分有主语和谓语，次要成分有表语、宾语、定语、状语、补足语和同位语，一、主语We often speak English in class.我们经...

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...

一、表示时间，注意以下用法：① 表示时间的某一点、某一时刻或年龄等用 at。如：I get up at six in the morning. 我早上六点钟起床。He got married at the age of 25. 他 25 岁结婚。② 泛指...

一、知识要点1.名词.n.名词用来表示人、事物或抽象概念，如：boy 男孩，morning 早晨，duty 责任，在句子中主要作主语、表语、宾语、补足语、同位语、定语等。The tomatoes on the table are ve...

1. had better的基本用法特点You'd better get some sleep．你最好去睡一会儿。We had better go before it rains. 我们最好在下雨前就去。 2. had better如何构成否定式和疑问式构成否定...

A story is told about，a young married couple whose names are Jim and Dclla. They are poor but very much in love with each other.有一对夫妻，丈夫叫吉姆，妻子叫黛拉他们生活窘迫，但...

shall和should用作助动词时，should是shall的过去式；用作情态动词时，shall和should是两个不同的词，希望同学们对这两个词的用法加以区别。shall的用法（1）shall表义务，表示说话人的允诺、命...