거짓말

In a sentence

• 그는 나에게 거짓말을 했어요.

  He lied to me.

  In this sentence, "거짓말" (lie) is a noun used with the verb "하다" (to do) to mean "to lie."

• 거짓말하지 마세요.

  Don't lie.

  Here, "거짓말" is used with the imperative form "하지 마세요" (don't do) to instruct someone not to lie.

• 나는 그의 말을 믿었지만, 그것은 거짓말이었어요.

  I believed his words, but it was a lie.

  In this example, "거짓말" is a subject of the sentence, described as having occurred as indicated by "이었어요" (was).