pass
【动词】vt.& vi.走过；通过；批准；度过
【动词】vt.传球；及格；发生；不要
【名词】0n.通道；通行证；关口；越过
past
【形容词】adj.过去的，以前的；结束的；前任的
【名词】n.过去，过往；往事；[语]过去时
【介词】prep.超过，超出；远于；越过
【副词】adv.经过，超过
首先，pass没有形容词、介词和副词的词性，而past没有动词的词性；作为名词来讲，pass是关口、通行证之类的含义，而past则为过去之含义。
拓展资料
pass
verb
移动 move
1
通过；走过
to move past or to the other side of sb/sth
[V] Several people were passing but nobody offered to help.
有几个人擦肩而过，却没有人主动提出帮助。
I hailed a passing taxi.
我招呼了一辆路过的出租车。
The road was so narrow that cars were unable to pass.
道路太窄，汽车无法通过。
[VN] to pass a barrier/sentry/checkpoint
通过障碍；经过步哨旁边；通过检查站
You'll pass a bank on the way to the train station.
你在去火车站的路上会经过一家银行。
She passed me in the street without even saying hello.
她在街上与我擦肩而过，却连一声招呼也没打。
(especially NAmE) There was a truck behind that was trying to pass me.
后面有一辆卡车想要超过我。
【帮助说明】 The usual word in British English is overtake . 英国英语通常用overtake。
2
[V + adv./prep.] 沿某方向前进；向某方向移动
to go or move in the direction mentioned
The procession passed slowly along the street.
队伍沿街缓缓行进。
A plane passed low overhead.
一架飞机从头上低空飞过。
3
[VN + adv./prep.] 使沿（某方向）移动；使达到（某位置）
to make sth move in the direction or into the position mentioned
He passed the rope around the post three times to secure it.
他把绳索在柱子上绕了三匝缠紧。
4
~ sth (to sb) | ~ sb sth
给；递；传递
to give sth to sb by putting it into their hands or in a place where they can easily reach it
[VN] Pass the salt, please.
请把盐递过来。
[VN , VNN] Pass that book over.
请把那本书递过来。
Pass me over that book.
请递给我那本书。
5
~ (sth) (to sb)
(in ball games 球类运动) 传球
to kick, hit or throw the ball to a player of your own side
[VN] He passed the ball to Owen.
他把球传给欧文。
[V] Why do they keep passing back to the goalie?
他们为什么总是把球回传给守门员？
past
adj.
1
过去的；昔日的
gone by in time
in past years/centuries/ages
在过去的岁月 / 世纪 / 时代
in times past
在过去
The time for discussion is past.
讨论的时间已过。
2
[only before noun] 刚过去的；刚结束的
gone by recently; just ended
I haven't seen much of her in the past few weeks.
近几周来我很少见到她。
The past month has been really busy at work.
上个月工作实在是忙。
3
[only before noun] 从前的；以往的
belonging to an earlier time
past events
以往的事件
From past experience I'd say he'd probably forgotten the time.
根据过去的经验，我想他可能把时间忘了。
past and present students of the college
学院的老校友和现在的在校生
Let's forget about who was more to blame─it's all past history .
咱们且忘掉更该责怪谁吧——那都是陈年旧账了。
4
[only before noun] (grammar 语法) （动词）过去式的
connected with the form of a verb used to express actions in the past