a.

1. 过去的；刚过去的
2. 过去了的；完了的
   The danger is past.

   危险已过。

3. 以前的；前任的[B]
   John Smith is a past president of our club.

   约翰·史密斯是我们俱乐部的前任主席。

4. 【语】过去（时）的[B]

prep.

1. （指时间、数量等）过；通过，经过
   The boys walked past our house.

   孩子们走过我们的房子。

2. （指范围、程度、能力等）超过
   Some of his poems are past comprehension.

   他的某些诗作无法理解。

n.

1. 过去，昔日[the S]
   In the past he had to read by candlelight.

   过去他只得在烛光下攻读。

2. 往事；经历；不光彩的往事[the S]
3. 【语】过去时；（动词的）过去式[the S]

ad.

1. 过；经过；越过
   I watched the people hurry past.

   我看着人们匆匆而过。

adj.

1. gone by in time and no longer existing.
   ▸recently elapsed:

   the past twelve months.
2. Grammar  (of a tense) expressing a past action or state.

n.

1. (usu. the past) a past period or the events in it.
   ▸a person's or thing's history or earlier life:

   the country's colourful past.
2. Grammar  a past tense or form of a verb.

prep.

1. to or on the further side of.
2. in front of or from one side to the other of.
3. beyond in time; later than.
4. no longer capable of.
5. beyond the scope of.

adv.

1. so as to pass from one side of something to the other.
2. used to indicate the passage of time:
   a week went past.