as 与like的用法区别
as,like 在汉语中均可表示“像”,但它们的用法却是有差异的.在正规英语中,as是一个连词,like是一个介词,两者是不能互换使用的.如不能说：
I can speak English like you can.
而应该说：I can speak English like you.
或：I can speak English as you can.
as有两个用途
a) 表示一种职业、身份或用途
eg: He has been working as a bus-driver for six months. (as 表示职业)
I put four desks together as a bed.
（as 表示用途）
b) 通过两种不同动作或情况的比较来表现 出它们的共同点
eg: He ran away from home, as his brother had the year before.
(通过as的比较,表示出兄弟俩有离家出走的共同点.)
In Greece, as in in Italy, they use a lot of olive oil in cooking.
（as表明希腊和意大利都有用橄榄油烹饪的习惯.）
当as用于表示a)的意义时,as是一个介词,后面只能跟名词或代词.当as用于表示b)的含义时,as时一个连词,后面可以跟一个从句或介词短语.
like是一个介词,后面只能跟名词或代词
eg: My brother was soon able to swim like me.
Don’t treat me like a child.
当as,like后跟名词或代词时,它们所表示的意义是不同的.as指的是一个人的职业,而like则表示“像 …… 一样做事”
eg: I worked as a slave. = I am a slave.
(as 用于表示身份)
I worked like a slave. = I worked very, very hard. (as用于表示比喻)