请介绍下All后面单复数的使用情况（谓语是不是用单数）

all:

a. 所有的,全部的
ad. 全部,全然
int. 全部,全体,一切

例句与用法:
1. All work and no play makes Jack a dull boy.
（谚）只工作不玩耍，聪明杰克也变傻。

2. I've known that all along.
自始至终，那件事我都知道。

3. He spent all his time reading.
他把全部时间都花在阅读上。

4. All enjoyed themselves.
每个人都玩得很尽兴。

5. The party was all but over when we arrived.
我们到的时候，晚会几乎要结束了。

6. I realized I had had it in my pocket all along.
我发觉原来这一直就在我口袋里。

7. It's all one to me whether we eat now or later.
现在吃或是等一会儿再吃对我来说都一样.

8. All/Half (of) the milk had been drunk.
所有的[有一半]奶已喝完.

英英解释:
形容词all:

1. quantifier; used with either mass or count nouns to indicate the whole number or amount of or every one of a class

2. completely given to or absorbed by

副词all:

1. to a complete degree or to the full or entire extent (`whol