连词:
weight是什么词
1. 假设一句话中有两个谓语，两句(一个主谓关系算一个句子)之间没有连词，也没有分号或句号，一定是填连接词。
注：
一句话：没有分号或句号。
在判定两个谓语时，非谓语和已经自带连词的谓语和从句无视。
1〕However, __34____there are many positive developments __35__ (associate) with the Internet, there are also certain fears and concerns.
1. As I thin[k back I realize how hard it is to view the world ____31____ the eyes of my childhood.  (through)
2.   39  in a warmer world, these cycles speed up, and bears have less time to hunt. but
2） I wanted to see as much of the city as possible in the two days  32  I was to return to Gu
angzhou. (2008年广州一模)
解析：因I wanted to…是一个句子，I was to return…也是一个句子，这两个句子之间没有连词，也没有分号或句号，一定是填连词；根据句意和两句之间的逻辑关系，可知“参观这个城市的尽可能多的地方”应是在“返回广州”之前，故填before。
[例9] He was very tired after doing this for a whole day,  37  he felt very happy… (2008年广东高考)
解析：因He was very tired…是一个句子，he felt very happy…也是一个句子，这两个句子之间没有连词，也没有分号或句号，一定是填连词；根据句意和两句之间逻辑关系，可知“干了一整天活累极了”与“感到非常高兴”是转折关系，故填but。
3）
2.只有一套主谓时也可能填连词,此时往往位于句首，构成：          ，连词承接上文或转折。
1)  39  in a warmer world, these cycles speed up, and bears have less time to hunt.   But
2)Then he asked, “  36  when are my fingers going to grow back?”
3)36 ________ it is extremely hard for us to put them into English properly.  (and)
3. The__34__ child must learn languages in a slow and often painful way. __35__ even though the learning may be slow and painful, the result is wonderful. (but)
3. 连词包括并列连词和从属连词。
并列连词：
◆ 1. 表示转折关系的并列连词。这类连词主要有 but, yet 等。如：
Someone borrowed my pen, but I don’t remember who.
He said he was our friend, yet he wouldn’t help us.
◆ 2. 表示因果关系的并列连词。这类连词主要有 for, so 等。如：
The child had a bad cough, so his mother took him to the doctor.
You are supposed to get rid of carelessness, for it often leads to serious errors.
注意：for表示结果通常不能放句首，也不能单独使用。
◆ 3. 表示并列关系的并列连词。这类连词主要有 and , or , either…or , neither…nor , not only…but (also) , both…and , as well as 等。如：
He didn’t go and she didn’t go either.
The weather is mild today; it is neither hot nor cold.
Both New York and London have traffic problems.
从属连词：
1〕辨析从句：
一看： 盖住从句看主句：
                                             
缺主要成分—主/宾/表等名词性从句
4. Professors do not have the time to explain 36_____ a university library works; they expect students, 37______(special) graduate students, to be able to exhaust the reference origins in the library.  (how)
 
                                   
不缺主要成分—同位/定/状
5. Therefore, the time 39______ a professor can spend with a student outside of class 40______( limit). (which)
二看：主句有无同位语从句中心词：
                                                                    有—同位/定
                                                                      无—定/状
三看：从句里是否缺主要成分：
                                                           
缺—定
                                                           
不缺—定/状
如何判断连词？
1. 名词性从句：
名词性从句分类：
1.that 不做成分，无意义。宾语从句中，可省略。
例：He said (that) he wanted to stay at home.
    In the first place, it often happens 34 we have trouble finding appropriate words and phrases to give expression to our mind.
2. 由连接代词who, whom, whose, what, which 和连接副词when, where, why, how 引导的宾语从句。这些连接代词和连接副词在宾语从句中充当某个成分。多靠翻译选择.
例： __36___ concern relates to a lack of control over__37__ appears on the Internet.
I started wondering   34  I refused to run the light.
3. 由if 或whether 引导的宾语从句。If 和whether 在句中的意思是“是否”。
例：I want to know if (whether) he lives there.
He asked me whether (if) I could help him.
状语从句：
状语从句和其他从句的区别？
◆ 1. 引导时间状语从句的从属连词
(1) 表示“当…时候”或“每当”的时间连词。主要的 when, while, as, whenever。如：
(2) 表示“在…之前(或之后)”的时间连词。主要的有before, after。如：
6. Think first   38  you lose your patience with someone you love. (before)
(3) 表示“自从”或“直到”的时间连词。主要的有since, until, till。如：
7. I knew she would sleep deeply for about twelve hours ____34____ the poison had stopped doing its harm. (until)
Never trouble trouble till trouble troubles you.
(4) 表示“一…就”的时间连词。主要的有as soon as, the moment, the minute, the second, the instant, immediately, directly, instantly, once, no sooner…than, hardly…when等。如：
I’ll let you know as soon as I hear from her.
I came immediately I heard the news.
(5) 表示“上次”、“下次”、“每次”等的时间连词。主要的有every time(每次)，each time(每次)，(the) next time(下次)，any time(随时)，(the) last time(上次)，the first time(第一次)。如：
I’ll tell him about it (the) next time I see him. 我下一次见到他时，我就把这个情况告诉他。
We lose a few skin cells every time we wash our hands. 每当我们洗手的时候，我们都要损失一些皮肤细胞。

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