some of后面用单数还是复数

some of后面可接复数名词，或不可数名词。当后面接复数名词时，谓语动词用复数，如Some of the books are new.当后面接不可数名词时，谓语动词用单数，如Some of the tea is new.of是介词，介词后面接人称代词宾格，如 Some of them.

I invited some of my colleagues but not all.

我邀请了一些同事，并不是所有的。

We scratched some of the dirt away.

我们刮掉了一些脏东西。

She met up with some of her old school friends.

她遇见几个老同学。

Some of the studies show positive results, whereas others do not.

有一些研究结果令人满意，然而其他的则不然。

Some of his ideas are really off the wall.

他有些想法真是十分新奇。