I didn't mean to eavesdrop, but I did overhear you. ✬

I didn't want Tom to overhear our conversation. ✬

I couldn't help but overhear what you said to Tom. ✬

I couldn't help but overhear your conversation. ✬

I couldn't help but overhear your conversation with Tom. ✬

I can't talk to you here. Someone might overhear us. ✬

Tom put his ear to the door in an effort to overhear what Mary was saying on the phone. ✬

Tom and Mary were speaking loud enough for John to overhear them. ✬

Do you think anyone will be able to overhear what we're talking about? ✬

I couldn't help overhear your conversation. ✬