1、and conj
和;及;就
短语：1. and so on 等等
e.g. This book tells about food, fruits, dishes and so on.
这本书讲了有关食物、水果、菜肴等等有关的东西。
2、
as adv., conj prep
作为主句的先行词;同样地;与一样;
短语：1. asas(用于比较)与一样;
e.g. Tom is as tall as his brother. 汤姆和他弟弟一样高。
2. as a result 结果：
e.g. He works hard all day, as a result, he got a good mark in his English exam.
他整日努力学习，因此在英语考试中取得了优异的成绩。
3. as if 仿佛，好像：
e.g.He talks as if he knew about it. 他说起来好像知道这件事似的。
4.as long as 只要，和一样长：
e.g.You will do well in your English study as /so long as you keep on.
只要坚持下去，你一定能学好英语 。
5. as well 也;
e.g. My class went to the cinema and I went there as well.
3、
asleep adj
睡熟(的);不活跃(的 );
短语：1.fall asleep 入睡：
e.g.Though it is 12 in the night. I still find it hard to fall asleep.
尽管已经是夜里12点钟了，我发现还是很难入睡。
词型转换：Sleep/sleeping/sleepy/asleep
4、
background n
背景;远景; 出身;个人背景。
e.g. Hes always going on about his working class background.
他老是谈论自己出身于工薪阶层家庭。
Without knowing the background the case, I couldnt possibly comment.
因为不了解案件的背景情况，我不可能加以评论。
5、
because conj
因为;由于 ;
辨析：because of (接名词或者名词词组) 因为：
e.g. He begs because of poverty, not hunger.
他不是因为饿了，而是因为贫穷才要饭的。
because 后接句子。