John cheated/cheated on Mary.

[angliholic]

John cheated Mary.
John cheated on Mary.


Do both of the above samples sound correct? If yes, do they convey the same idea? Thanks.

[mykwyner]

They both sound correct, but they have different meanings.

John cheated Mary.

John used some kind of dishonesty in order to take something away from Mary. Example: Mary gave John money to invest for her, but John spent the money on himself.

John cheated on Mary.

This sentence has only one meaning: John has promised Mary that he will not have romantic relations with any other women, but he broke that promise.

[angliholic]

Thanks, mykwyner, for the clear reply.
Got it.