你不必了，我已经告诉他了。

No, you need't, I have told him.

youdao

你不必再告诉他这个消息，他已经知道了。

You needn't have told him the news; he knew it already.

youdao

你不必再告诉他这个消息，他已经知道了。

You needn't have told him the news; he knew it already.

youdao