Like, as -- Do not use like for as or as if. In general, use like to compare phrases and clauses with nouns and pronouns: use as when comparing with phrases and clauses that contain a verb.

Wrong: "Jim blocks the linebacker like he should."

Right: "Jim blocks the linebacker as he should."

Right: "Jim blocks like a pro."

Like vs. such as:

Lyon said contributors so far include Elmira businesses such as[EB1] Dimon and Bacorn Inc., I.D. Booth Inc., Robinson Lumber, Chapel Lumber, Overhead Door Co., and architect Larry Foor, as well as Corning Community College.

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[EB1]Meaning for example. Like would only be used to say that the items listed are “similar to” what is being discussed.