mail
主要用于美式英语,邮寄,跟邮政有关系
Is there any mail this morning?今天上午有邮件吗?
I have mailed the letter.我已将该信付邮.
send
除了有“寄”的意思,还有“派遣、打发”的意思,可以send somebody to do something.,而mail 则不能.
He sent his son to return the books to the library.他派他儿子把书还给图书馆.
You'd better send the letter by air.这封信你最好寄航空.
post
主要用于英式英语,和 mail 的意思和用法差不多,只是 post 作名词使用时,可解作“柱、杆、岗位、海报”等
Do you mind posting a letter for me?你能帮我寄封信吗?
The notice was nailed to a post.布告钉在一根柱子上.
pass
“传递”,有穿过、经过的意思.其它含义有“及格、时间流逝”.
Please pass me the salt.请把盐递给我.
He passed in German,but failed in English.他德语考试及格了,但英语没及格