Are like and as the same?

"Like" and "as" are not the same, although they are often used to make comparisons. "Like" is typically used to compare nouns or pronouns, while "as" is used to compare actions or introduce clauses. For example, you would say "She sings like a bird" (comparing her singing to a bird) but "She sings as a professional" (indicating the manner in which she sings). Their usage reflects different grammatical structures in English.