知道关于他的事英语怎么翻译

A. 如果你想了解更多有关他的事情就加入我们[用英语怎么翻译]

if you want to know something more about you ,join us please.

B. 现在我知道很多关于他的事情了。 翻译成英语

Now i know lots of things about him.
希望能够帮到楼主

C. “我不知道她在说些什么”和“谁也不知道他都做了些什么”用英语怎么翻译

我不知道她在说些什么：I don't know to what she is saying
谁也不知道他都做了些什么：Nobody knows what he is doing

D. 这件事你应该问他的英文

1、You should ask him why speak ill of you.
2、If he eat his words,it could be continue to be friends.
3、If he does not admit mistakes,do not be friends with him.