I know him well.

我非常了解他。

youdao

I know him well enough to borrow money from him but not well enough to lend money to him.

我认识他可以向他借钱，但还达不到把钱借给他的程度。

youdao

And he meant trust, in a very specific way, he didn't mean trust as, I mean, Tom I've worked with him for 15 years, I know him well.

他所说的信任，非常的具体，并不是说，我总是信任他，Tom, i, trust, with, my, life，我和他共事了15年，我很了解他。

youdao

I knew him well enough to know what he was looking for in a WHCF.

我也很了解他,我知道他需要怎样的办公室主任。

普林斯顿公开课 - 国际座谈会课程节选

and I got to know him extremely well,

和他非常熟悉，

写推荐书的人 - SpeakingMax英语口语达人

I'm sure a lot of people won't know him that well, but I know him relatively well and there won't be any surprises.

BBC: Murray starts with convincing win

Well, I know him at least as well as she does and I didn't love him very much.

NPR: Electronics Pioneer William Shockley's Legacy

And the managers quote one variation of Ms. Lewinsky's description of that December 28 conversation as follows: At some point I said to him, well you know, should I -- maybe I should put the gifts away outside my house somewhere or give them to someone, maybe Betty and he sort of said -- I think he responded, I don't know, let me think about that and left that topic.

CNN: Transcript: White House Counsel Ruff's opening statement