1 as 和like 都可以表示“同……一样，如像”。as 指人的职业、身份、地位、角色等，也指物的功能、作用等。like着重人或物在状貌、形态、性格方面相像，也指行为方式的相同。as表示的是事实上的相像，而like则是一种比喻。一般来讲，as 是连词，后跟的是从句，而like 是介词，后跟的是名词或代词。
She is like her mother. 她像她母亲。
It's like new again. 它又像新的一样。
What's the weather like today？今天的天气怎样？
This tree is as tall as that one (is). 这棵树同那棵树一样高。
He crawled out of the hut on his belly, like a snake. 他像一条蛇匍匐着爬出了小屋。
He works as others do. 他像其他人一样工作 。
He works like others.
You should do as he tells you. 你应该像他告诉你的那样去做 。
You should do like him. 你应该像他那样去做 。
She is a teacher, as her mother is. 她是一位教师，同她母亲一样 。
She isn't much like her mother. 她不太像她母亲 。
2 like 构成的短语搭配有：look like, like this, like that。
Don't do it like that . Do it like this . 不要那样做，要这样做。
3 like 作介词的反义词是unlike ，意为“不像，和……不同”。
Unlike her, her daughter is tall. 不像她，她女儿个子高。
4 like 作动词，意为“喜欢，喜爱，想要(would/should like)”，反义词是dislike ，意为“不喜欢”。
I don't like the film. 我不喜欢这部电影。
Would you like a cup of tea？您想要一杯茶吗？
I dislike traveling by ship. 我不喜欢乘船旅游。
5 as 也可用作介词，表示“作为，当作”，后跟名词，而like 作介词表示“像……一样”。
As a pupil, you must study hard. 作为一名学生，你必须努力学习。
We treat him as a friend. 我们把他当朋友。
比较
He spoke to her like her father. 他像父亲那样同她说话。（他不是她父亲）
He spoke to her as her father. 他以父亲的身份同她说话。