英语四级语法教程汇总和更新

1.概念:限制性定语从句:限制性定语从句与先行词之间的关系比较密切，对所修饰的先行词起修饰限制作用，如果去掉，会影响句子的主要意思的完... [查看全文]

当关系代词在定语从句中作介词宾语时，我们通常用介词+关系代词引导定语从句；如果指人，用介词+whom，如果指物，用介词+ which。介词与关... [查看全文]

1. as引导的非限制性定语从句as有时作关系代词，代替整个主句，对其进行说明但as也回用于固定搭配，像as we all know, as it is kn... [查看全文]

1)Whoever spits in public will be punished here.(Whoever 可以用anyone who 代替)2)The parents will use what they have to send their son to technical school.(what 可以用all that代替) [查看全文]

a)　在there be 句型中，只用that，不用which。b)　在不定代词，如：anything, nothing, the one, all, much, few, any, little... [查看全文]

请看这道题，这个until 后要接过去分词吗?He is a man of few words, and seldom speaks until _________ to.A. spoken B.... [查看全文]

1. 主要用来表示根据某学说、某书刊、某文件、某人所说等或表示按照某法律、某规定、某惯例、某情况等：According to the timetable, ... [查看全文]

1. had better的基本用法特点其意为最好、应该，后接动词原形，与情态动词should用法相似，其中的had通常缩略为'd。如：You'd b... [查看全文]

1.enough做形容词，表示足够的，足够量的，通常与for连用。如：They had enough cash for a one-way ticket.他们有足够的现金买一张... [查看全文]

1.enjoy表示享受…的乐趣，如：He was a guy who enjoyed life to the full.他是个尽情享受生活乐趣的人。2.enjoy表示享有，如：T... [查看全文]