I feel like going to bed. I 'm so tired. 我想上床睡觉。我累极了。 As和like用法的区别
as 和 like 在汉语中都译做\像\但字面下的隐含意思是不同的. like侧重A B两者间的比较,并不意味着A和B属于一类或完全相似. 例如:He speak English like an Englishman.(=in a way an Englishman speaks English.) 表示有些相象
as则侧重于同一性,意味着A B两者属于同一类或完全相似.
例如:He speaks English as an Englishman.(=as well as an English.) 表示讲得一样好
很早的时候，like是形容词，表示相象、相同、类似等意；as是连接词。 Samy and Sammy are very like. Samy和Sammy长得很像。
Paul behaved as a child（does）．保罗的举止像个小孩。（句子有省略） 后来，like作为介词使用，表示像?一样；as也可以作为介词使用了。 Paul behaved like a child．保罗的举止像个小孩。（句子没有省略） 再比较：
Let me speak to you as a father．让我以父亲的地位对你说说。（=I am your father and I am speaking to you in that character）
Let me speak to you like a father．让我像你父亲那样对你说说。（= I am not your father but I am speaking to you in the way your father might） 再后来，有些语法学家把以往like不允许作连词使用的规则也改了，用来代替引导方式状语从句的as。
I can't sing like I used to do．我不能像过去那样地唱了。（指唱的音色）
He writes just like his brother did when he was young．他写字的手法和他兄弟年轻时写的差不离。（指书法的风格和字型） 即使如此，like和as有时还是有些区别的。试比较：
The prisoner was hanged like a murderer．这个囚徒像杀人犯那样被处以绞刑（=?as if he were a murderer）。
The prisoner was hanged as a murderer．这个犯人作为杀人犯被处以绞刑。（这个犯人就是杀人犯） 状语从句 一 定义：
A状语主要是用来修饰动词和形容词的，以表明动作发生或状态存在的时间，地点，原因，等。
1 Ten years ago, She began to live in Dalian. 时间状语修饰began 2 The boy was praised for his bravery. 原因状语修饰was praised B 状语从句就是用一个句子来代替上面的时间状语和原因状语。 1 Ten years ago, she began to live in Dalian.
When she was 12 years old, she began to live in Dalian. 2 The boy was praised for his bravery.
The boy was praised because he saved the baby’s life in the freezing river.
二 状语从句的种类：
A 时间状语从句: 连接时间状语从句的连接词有:
(1) 连词：when, while, as. 它们都表示当?时候的意思。如果主句和从句的动作同时发生且都是进行时态，只用while, as. 其他情况下when, while, as通用。
１ When he came in, I was listening to the radio． ２ As I was wandering in the street, I met her.
３ While (as) I was watching TV, my mum was cooking in the kitchen. (2) 连词before, after, since, until(till). 当他们表示时间时，他们既
是介词又是连词。
He usually drinks a cup of tea before he goes to school.连词 He usually drinks a cup of tea before going to school. 介词 He usually drinks a cup of coffee after he comes back from school.连词
He usually drinks a cup of coffee after coming back from school. 介词
I have lived in Dalian since my son was born in 1999.连词 通常情况下，主句用现在完成时，从句用一般过去时。 I have lived in Dalian since 1999.介词
I will wait here until(till) you finish your job. 连词 I will wait here until(till) 8pm.介词 (3) 词组：as soon as
I will tell him as soon as he comes back.
As soon as she finishes her homework, she will play tennis. 通常情况下，主句用一般将来时，as soon as 引导的从句用一般现在时。 B 地点状语从句：
连接地点状语从句的连接词有：where, wherever=no matter where: １ Where there is water, there is life. ２ Where there is a will, there is a way.
３ Wherever you go, I will follow you.== No matter where you go, I will follow you.
４ I will go wherever I can find a good job.== I will go no matter where I can find a good job. C 原因状语从句：
连接原因状语从句的连接词有：because, as, since, for.
１ Tom was late for school this morning because he didn’t catch the early bus.
２ I couldn’t go to Beijing on business as my mother was ill. ３ Since all of us agreed about this plan, we will carry it out next week.
４ We listened carefully, for the speech was very important. 注意：
当连接原因状语从句时，because语气最强，as, since, for次之；because, as, since引导的从句可在主句前面或后面， for引导的从句只能在主句的后面。
D 条件状语从句：
连接条件状语从句的连接词有：if, unless, as long as.
１ If I am not busy tomorrow, I will play football with you. ２ You won’t pass the exam unless you work hard on it. ３ As long as you take my advice, you will outwit your rival. 注意：一般情况下，if, unless, as long as 引导的从句用一般现在时，主句用一般将来时。 E 让步状语从句:
连接让步状语从句的连接词有：although, though, even if, even though, however, whatever, whenever, whoever, whichever.
１ Although (though) I gave him some advice, he didn’t take them. ２ John continued to work hard even if (even though) he felt sick. ３ Whatever you do, I will support you.==No matter what you do, I will support you.
４ Whoever you may be, I will not let you in. ===No matter who you may be, I will not let you in.
５ However difficult it may be, we will overcome it. === No matter how difficult it may be, we will overcome it. 注意：
一般情况下，although等于though, even if等于even though, however等于no matter how, wh-ever等于 no matter wh-． F 方式状语从句:
连接方式状语从句的连接词有：as, as if, as though. １ You should do your homework as Tom did.