not all that

1. 不那么

It was not all that urgent.

这事并不那么紧急。

not but that

1. 虽然

The boy is very healthy -- not but that he will catch colds sometimes.

这男孩很健康--虽然有时候也感冒。

not that

1. 并非

Not that it matters, but how did you spend so much money in such a short period of time?

我不是说有什么关系, 但是, 这么短的时间里你是怎么花掉这么多钱的?

not that ... but that ...

1. 不是……而是……

Not that I do not want to lend you money, but that I do not have any money now.

不是我不肯借钱给你, 而是我现在根本就没钱。

Not that I know of.

1. 据我所知并非如此。

I was told that he failed in the test. Not that I know of.

听说他考试没通过。据我所知并非那样。