And 用法中几个值得注意的问题
1、and 连接两个动词,有时后面动词的行为是前面动词的行为对象或目的,译成汉语时可以连着翻译。但有时and前面的部分用来表示条件。
例:
Try and do it again. 再做做看。(行为对象)
Please send and fetch the mini-camera. 请派人把小型照相机拿来。(行为目的)
Let us go and try it again. 让我们再去试试。(行为目的)
Try again and you will succeed. 再试一次,你就会成功。(条件)

2、and 所连接的并列关系及判别
例:
It is impossible to live in society and be independent of society. 生于社会,不能超乎(或脱离)社会。(and 连接两个不定式。)
Everywhere you can find new types of men and objects in the hometown. 在故乡,新人新事比比皆是。(and 连接两个名词 men 和 objects。)
This crude oil is a complex mixture of gaseous and liquid saturated and unsaturated molecules. 这种原油系气态、液态饱和分子和气态、液态非饱和分子所构成的混合物。
Rubber gets warmer when stretched and cools when relaxed. 橡皮(被)拉伸时发热,而放松时变凉。(and 连接两个谓语 gets 和 cools。)

3、用 and 来重叠词的用法
I. 用 and 重叠比较级来表示“越来越……”之意:
例:
In spring the day is getting longer and longer and the night (is getting) shorter and shorter. 春季白天越来越长,夜晚越来越短。
II. 用 and 重叠词来表示强调和延续之意:
例:
What we want, first and foremost, is to learn, to learn and to learn. 我们首先需要的是学习、学习、再学习。

4、注意 and 可使句子成分大为省略
例:
The best conductor has the least resistance, and the poorest (conductor has) the greatest (resistance). 最好的导体电阻最小,而最差的导体电阻最大。
All bodies consist of molecules and these (molecules consist) of atoms. 一切物体都由分子组成,而分子由原子组成。

5、注意 and 前的省略情况,一般以“名词 + and…”结构出现
例:
Another hour, and all the doors will be locked. 再过一小时,所有门都要上锁。(Another hour, and… = When another hour has passed…)
One more effort, and we shall succeed. 再努力一下,我们就会成功。(One more effort, and… = If we make one more effort…. )

6、注意 and 用于加法和一百以上的数字中
例:
One and two are(或 make)three. 一加二等于三。
one hundred and twelve pagers. 一百一十二个寻呼机

7、and 用于罗列举例之末,表示“…等”之意时短语汇总
例:
and so on, and so forth, and others, and the like, and what not 以及 “, etc. ”(但前面不能用 and )等。
