1. 连接两个相同的比较级，表示“越来越……”。如：The car runsfaster and faster. 汽车开得越来越快。Our country is becomingmore and more beautiful. 我们国家变得越来越美丽。
2. 连接两个相同的动词，表示动作的反复或连续。如：We ran andran. 我们跑呀跑呀。The boys laughed and laughed. 这些孩子笑个不停。
3. 连接两个相同的名词，表示“ 许多”或“有各种各样的” (即有好的也有坏的)。如：We waited for hours and hours. 我们不知等了多少个小时。There are books and books. 有各种各样的书 (即书有好坏之分)。
4. 在口语中用在 come, go, run, stay, stop, try 等之后表示目的 (and 在此相当于不定式符号 to)。如：Come and have a drink. 来喝一杯。来喝一杯。Try and finish the work in a week. 设法在一周之内完成这项工作。We ought to stop and think. 我们应该停下来想一想。以上动词除 try 不能有形式变化之外，其它动词都可有多种形式。如：正：He came and had a drink with me. 他来跟我喝了一杯。误：He tried and finished the work in a week. 在 come, go 之后的and有时可以省略 (尤其在美国英语中)。如：
I’llcome (and) see you later. 我晚些时候再来看你。
5. 用在祈使句后，表示结果，意为“那么” (暗示一种条件)。如：Workhard and you’ll succeed. (=If you work hard, you’ll succeed. )努力干吧，你会成功的。
6. 用在“很”，“挺”。如：good andfast 很快 nice and warm 挺暖和
7. 在主从复合句中，不要在主句前误加 and。如：要是他这样说，那他就是个骗子。正：If he said so, he is a liar. 误：If he said so, and he is a liar. If he said
8. 用 and 连接两个名词或代词作主语时，其谓语动词一般要用复数，但若是被连接的两个名词指的是同一个人或同一件东西，则谓语仍要用单数。如：A cart and horse was seen coming to us. 看见一辆马车向我们这边过来。The teacher and poet lives in the country. 这位老师诗人住在乡下。连接两个加数相加时，谓语用单、复数均可。如：
Five and five is[are] ten. 五加五得十。
9. 某些用 and连接的两个词，与汉语顺序相反，不要按汉语词序颠倒过来。如：rich and poor 贫富 land and water 水陆 right andleft 左右 north and south 南北 food and drink 饮食 foodand clothing 衣食
10. 在否定词之后通常用 or 代之，比较。如：(1) He spoke loudly and clearly. 他说话声音宏亮且清晰。(2) He didn’t speak loudly or clearly. 他说话声音不大且不清晰。若要连接两个同为否定形式的短语或句子，则仍用 and。如：He hasno brothers and no sisters (= He has no brothers or sisters). 他没有兄弟姐妹。He hasno brother He can’t write and I can’t read. 他不会写，而我不会读。
11. 在下列各类有关主从复合句以及非谓语动词的测试题中，注意有无 and 的差别。如：

(1) ①It __C__ fine, we went out for a walk.
②It __A__ fine, and we went out for a walk.       
 A. was                     B. is                        C. being                  D. were
(2) ①There I saw five people, the teacher __A__.   
②There I saw five people, and the teacher __B__.       
A. included                B. was included        C. including             D. was including
(3) ①He bought a lot of books, most of __D__ are about agriculture.    ②He bought a lot of books, and most of __A__ are about agriculture.
A. them                     B. books                  C. his                     D. which