1) I heard it but now.

我刚听到这件事。
2) I have heard of the affair.

我听说过这件事。
3) Good,I'm glad to hear that

很好,听到这件事太高兴了
4) I know that from A to Z

我很了解这件事
5) I have no recollection of it.

我不记得这件事。
6) I did it in error.

我做错了这件事。
参考词条