some 通常不用于否定句，但有时可以。如：

I don't like some of them. 我不喜欢其中的一些。（言外之意：其他的还是喜欢的）

请问下面这句的 some 用于否定句是属于什么用法：

If I don’t get some time to have a rest, I can’t work well.

同意曹老师解答！

some属于肯定词,一般不用于否定句和疑问句中。但是在不同语气表示特殊含义中，可以使用在否定句中。

Would you like some tea ?

some用于疑问句希望获得对方肯定答复。

A:肯定词:用于肯定句：肯定词一般主要用于表示肯定意义的句子，英语中肯定词主要有：some, one or the other, something, somebody, soemone, somehow, somewhere,someplace, sometime, someimes, already, still, to come extent, some what, as well, too, 

To some extent, they are right.

I like swimming, too

Someone is knocking at the door.

备注：在特殊情况下可以使用在疑问句和条件句中。

B:非肯定词：一般用于否定句，疑问句，表示某种不太肯定的概念，一般不用于肯定句，英语非肯定词有any, either, anything, anybody, anyone, in any way, anywhere,anyplace, ever, anytime, yet, any more, any longer, at all 

Have you finished your work?

-Not yet

Have you ever been to China?

He doesn't live here any more.

C:否定词:用于否定句表示否定意义，no, not, never, hardly, seldom, little, few,nobody, nothing。