我找不到手表了，我一定把它给丢了。

I cannot find my watch; I must have lost it.

youdao

佩特拉：本，我不想调查这个，我只是——我只是知道如果我给了你这个，我也要负责任。但我知道你一定需要它。发过来了。

Petra: Ben I don't want it, I just – I just know if wanna be responsible for having giving it to you but I know you need it. Here.

youdao

我一定把它忘在房间里了。

I must have left it in my room.

youdao