I'd like to know the difference between like and as

[question]

I'd like to know the difference between like and as. I'd appreciate if you could answer my question.

Thank you !

[Torsten]

The main difference is that as usually comes before a clause (a group of words with both a subject and a verb). For example: Do as I say. However, people often use like instead of as to introduce a clause, especially in American English. So, instead of saying It looks as if it's going to rain they might say It looks like it's going to rain.
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