7.非限制性定语从句非限制性定语从句修饰先行词或整个主句，起补充说明的作用，如果省略掉，原句句意仍保持完整。非限制性定语从句要用逗号与主
状语从句1. 状语从句中以下四种从句考得较多，这里给予简单介绍。1) 时间状语从句时间状语从句主要由以下连词引导：when, whenever, as, while, since, until,
2) 条件状语从句条件状语从句主要由以下连词引导：if, unless, providing/provided (that), suppose/supposing (that), on condition (that), as/so long as, in case等。So long as you wo
3) 让步状语从句让步状语从句主要由以下连词引导：though, although, even if, even though, whatever, however, whoever, wherever, no matter how/ what/ where/ when等。以下介绍几
4) 比较状语从句比较状语从句主要由以下连词引导：(not) as as, (not) the same as, (not) such as, not so as, than, the + 比较级, the +比较级等。We have had a lot more rain
宾语从句1) 及物动词后的宾语从句有些动词的宾语从句前还可有一个间接宾语。I remember that we have learned this word before.I don’t understand what you have said.Sh
2) 介词的宾语从句It depends on whether you want to do it or notThere is disagreement among economists about what money is and how money is measured.Note: 在介词in后面跟that引导的宾
常考的几种倒装结构1) 当表示否定或基本否定的词或词组位于句首作状语时用倒装。这类词或词组常用的有：never, nowhere, seldom, rarely, little, hardly, scarcely
16)She can speak quite fluent English. She____.A)must been in the U.S.A. for some timeB)must have been in the U.S.A. for some timeC)should have been in the U.S.A. for some timeD)May be in the U.S.A. f
21) Where ____ my umbrella?”Somebody ____ it away by mistake.”A) is,must have takenB) is, must takeC) have been, must takeD) is,takes22) What ____ would happen if the director knew you fel