"like" means "similar"
Their house looks like ours. (nearly the same, similar)
"as" means "different, to be something or somebody else"
They were dressed as clowns.
"As" is used when we name a profession of a person.
She works as a teacher.
٨ ديسمبر ٢٠١٦
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There is no big difference in some circumstance, but they are different words in general with different applications.
١٨ يناير ٢٠١٧
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He was doing very well as if he was a professional skill worker.