1） a big time：尽兴，高兴的时刻
e.g. I had a big time there.
the big time：第一流，最高级
e.g. Don’t worry you are in the big time now.

2） according to：按照，根据
e.g. They were commended or criticized according to their work.
according as：随……而定
e.g. The thermometer rises or falls according as the air is hot or cold.

3） admit to：承认
e.g. I have to admit to a dislike for modern music.
admit sb.(in) to：允许某人进入某地或加入某组织、行业
e.g. They have admitted me into their club.
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4） all for：完全赞成
e.g. I am all for holding a meeting to discuss it.
for all：尽管
e.g. They could not open the box for all their forces.

5） all in all：总的说来
e.g. All in all it is a success.
all in：疲倦，筋疲力尽
e.g. He was all in but he stuck it out.

6） as it is (was)：照目前的情况来看
e.g. As it is we shall be able to complete our task in time.
as it were：可以说，姑且这样说
e.g. He is as it were a walking dictionary.

7） as much as：几乎，实际上
e.g. By running away he as much as admitted that he had taken the money.
as much…as：与……一样多
e.g. It is as much our responsibility as yours.

8） as well：也，还是……为好
e.g. He gave me advice and money as well. Since you have begun to do it you may as well finish it.
as well as：不仅……而且，除……之外
e.g. With television we see a picture as well as hearing sound. Small towns as well as big cities are being rapidly industrialized.

9） at one time从前某个时期
e.g. At one time we met frequently.
at a time：每次，一次
e.g. You can borrow only two books at a time.