2.Don't take his remarks too seriously.He's so upset that I don't think he really knows what ____.he said 与 he's saying 怎么区别啊为什么要选he's saying

2.Don't take his remarks too seriously.He's so upset that I don't think he really knows what ____.he said 与 he's saying 怎么区别啊为什么要选he's saying
2.Don't take his remarks too seriously.He's so upset that I don't think he really knows what ____.
he said 与 he's saying 怎么区别啊
为什么要选he's saying

2.Don't take his remarks too seriously.He's so upset that I don't think he really knows what ____.he said 与 he's saying 怎么区别啊为什么要选he's saying
he said是过去时,译为：他不知道他说过什么.
he's saying是进行时,译为：他不知道自己（正）在说什么.
因为前面全部是在说他现在怎样,he's so upset 他现在非常不高兴.当然是我认为他现在不知道他在说什么.

第一个是过去时，表示他不知道自己说过什么
第二个是进行时，表示他不知道自己在说什么