1.mail的基本意思是“邮寄”,指通过邮局系统把信件或其他物品由一个地方寄到另外一个地方,是美式英语,其用法与英式英语中的post相同。
2.mail只用作及物动词,可接名词或代词作宾语,也可接双宾语,其间接宾语可以转化为介词to的宾语。
3.mail是瞬间动词,不可与表示一段时间的状语连用。

用作及物动词
▲S+～+n./pron.
He mailed the letter this morning.他今天上午把信寄出去了。
Mind that you don't forget to mail the letters.注意别忘了把信寄出。
Please remember to mail the parcel.请记住把包裹寄了。
I mailed a letter of apology.我发了一封道歉信。
He mailed a parcel yesterday.他昨天邮寄了一个包裹。
◇ 用于be ～ed 结构
Catalogues of our products will be mailed on request.产品目录承索即寄。
I see from the postmark that this card was mailed from Mary's holiday address.我从邮戳上看出,这张明信片是从玛丽度假所住的地方邮来的。
用作双宾动词
▲S+～+pron./n.+n./pron.
He mailed his mother 50 yuan every month.他每月给母亲邮寄50元。
We'll mail you a check the first thing in the morning.我们早上要做的第一件事就是给你寄支票。
Did you mail John the book?你给约翰寄书了吗?
She mailed her brother two books.她给弟弟邮了两本书。
▲S+～+n./pron.+to pron./n.
He mailed the package to me.他给我邮寄了一个包裹。
Mail the dispatch to the manager.把这个急件发送给经理。
She mailed a book to me.她寄了本书给我。

mail to, address to, post to
参见address条。
mail, deliver, dispatch, send, ship
这五个词都有“送”的意思。它们之间的区别在于：
1.mail指将信件、包裹等物寄出去,强调将某物品寄送出去这一行为。
2.deliver指送货。例如:
The goods will be delivered at noon tomorrow.明天中午交货。
The farmers guarantee the quantity and quality of the vegetables that are delivered.农民们保证交售蔬菜的质量和数量。
3.dispatch可指上级向下级派遣人员〔部队、舰队〕等,强调紧急发出。例如:
A messenger was dispatched to take the news to the soldiers at the front.一名通讯员被派去给前线士兵送消息。
The allies agreed to dispatch reinforcements.同盟国同意派遣增援部队。
4.send不涉及客体的内容或方法。例如:
Let's all go to the airport to send him off.我们都到机场给他送行。
If any letters come after you've left,I'll send them on.如果你离开后,有信来了,我会转寄去的。
Have you sent round the notice about the Christmas party yet?关于圣诞节晚会的通告,你是否已送出传阅?
5.ship是指以水运、陆运、空运等方式运送货物,现常用于商业。例如:
Some fruit doesn't ship well.有些水果不便运送。
The goods were shipped last week.货物已于上周装船运走。

［同义词］ n.  correspondence, delivery, letters, parcels, post v.  deliver, dispatch, post, send, ship
［词源］  ＜古法语male(袋)

1.mail的基本意思是“邮政(制度),邮递”,指通过邮局系统把信件或其他物(体)由一个地方寄到另外一个地方的行为,通常与the连用,只用作单数名词或不可数名词。
2.mail有时也可作“邮件,邮包”解,一般用作不可数名词; 当指“一次发送或收取的邮件”时,是可数名词。

I'm thinking of studying engineering by mail.我在想通过函授学工程学。
The ship calls at each port on this coast to pick up passengers and mail.那艘轮船在沿海每个港口停下,搭载乘客和接取邮件。
The flood of fan mail proved he'd arrived. 崇拜者的信件潮水般地涌来,证明他成功了。
My mail averages 11 letters a day.我的邮件平均每天达到11封信。
They forwarded his mail to his new address.他们把他的邮件寄到他的新地址。
Is there another mail in the afternoon?下午有一批邮件吗?

mail, post
参见post条。