午前的英文：
AM
ante meridiem
forenoon

参考例句：

"Rain before seven, fine before eleven"
早晨下雨午前晴

It may rain before noon.
午前可能下雨。

I'm afraid there's nothing available before noon.
对不起，中午前没空。

The minister doesn't see anybody before noon.
总理午前不接见任何人。

The accident happened a little before noon.
事故是在中午前一会儿发生的。

She always tries to finish her homework before noon
她总是力图在午前完成家庭作业。

The visitor left a little before noon
来访者在中午前一会儿离开了。

Could you possibly finish the project by noon?
中午前你有可能完成这个计划吗?

I 'd better be off now. I have a few things to do before noon .
我得走了。中午前我还有事儿。

We offer you firm the articles subject to receiving your reply here at noon on July 10.
本实盘以7月10日中午前得到贵方答复生效。

ante是什么意思：
n. 赌注；预付款
v. 下赌注；付出；付款

Many ants kill the horse
蚁多可杀马

Soldier ants protect the nest.
兵蚁负责蚁巢的安全。

They anted up and started to play.
他们下了赌注，开始赌起来了。

meridiem是什么意思：
正午

It starts at 8:00 ante meridiem .
早上8点开始。

How about next Monday at ten ante meridiem .
下星期一早上10点怎么样？

forenoon是什么意思：
n. 午前,上午