重点解析

1、介词+关系代词

1). “ 介词+关系代词”一般指“介词+which或介词+whom”.但 “from where从那儿since when从那时起”例外
2). “ 介词 +关系代词”中介词的选择：
一看先行词与什么介词搭配
This is our classroom, in the front of which there is a teacher’s desk.
二看从句动词,形容词等同介词的搭配
The girl for which he had fought all his life no longer seemed important to him.
He is the man on whom I think you can depend .
He wants to be the son of whom his parents will be proud.
三看上下句意思间的逻辑关系：
数量上有所属关系用of
There are two left, one of which is almost finished, and the other of which is not quite.
The committee consists of 20 members, 5 of whom are women.
时间上 有先后关系用before或after…
They went to Japan in 1988, after which they lived there .
条件关系“没有或有…”用without…或with…
Thank you for your help, without which I couldn’t have succeed.

2. Before

1）要过好久才….
It + will / would be+ 一段时间+ before …
It will be less than a month before we take the final examination.
2）过不了多久就会…
It won’t/wouldn’t be long before…
It wouldn’t be long before they made a breakthrough.
3)before long= soon不久、很快
  Long before=long long ago很久以前

3.“虽然、尽管”表示法

1）用介词despite或介词短语in spite of表示,但despite/ in spite of后只能接名词、代词或动词的ing形式
remain modest despite one’s achievements     尽管有成绩仍然保持谦虚
 2）用though, although表示。Though/although后接句子；though/although都不能同but连用。
3）用while表示：此时while从句一般放在主句前面。
4）用倒装句“adj/adv/n/v + as/ though+主语+其它 ”句型表示，该句型也不能同but连用。
比较下列句子。
尽管天气不好, 我们的假期仍过得很愉快。
Despite the bad weather ,we enjoyed our holiday.
In spite of the bad weather, we enjoyed our holiday.
Though/Although the weather was bad, we enjoyed our holiday.
While the weather was bad, we enjoyed our holiday.
Bad as the weather was, we enjoyed our holiday.

4.常见的部分倒装的情况

1）否定意义的词如：never , nothing, not until, not only, hardly, seldom…放在句首，后面的句子常部分倒装.
Never in my life have I experienced such exciting journey.
Not until then did he realized he made such a silly mistake.
Not until everything was all right did Tom get back.
2) only+状语放在句首时，后面的句子要部分倒装。
Only in this way can you learn English.

5．辨析wound, injure, hurt

这三个词都表示"受伤"。
wound一般指外伤,如枪伤、刀伤,尤指战争、战斗中受伤；
injure一般指由于意外或事故造成损伤；
hurt可以指肉体上的伤害,也可以指精神上的伤害,特指伴有疼痛的肉体上的伤害。如:
The soldier was badly wounded in the head.
Although his hand was injured, he continued to operate the machine.
He hurt his leg when he fell from the ladder.