half/ hɒːf /

1.noun,pronoun [of amount] [ object] 
一半

Just give me half (of) that, please.
请给我一半。
We ate half (of) the cake.
我们吃了蛋糕的一半。
The bridge was re-built in two halves.
桥是分开两半重建的。
2.noun,pronoun [BRIT] [of beer etc] 
半品脱

a half of lager
半品脱贮藏啤酒
3.noun,pronoun [BRIT] 
(child's ticket) 半票

A half to Oxford Street, please.
请给一张到牛津街的半价票。
4.adjective [+bottle] 
一半的

a half bottle of wine
半瓶葡萄酒
5.adverb [+empty] [ closed] [ open] [ asleep] 


By the end of his speech the room was half empty.
他讲完话时,人已走了一半了。
the two halves of the brain
左右脑
the first/second half
 [体育] 上/下半场
to cut sth in half
把某物切成两半
two/three {etc} and a half
二/三{等}点五
half a pound/kilo/mile {etc}
半磅/公斤/英里{等}
half a pint
半品脱
a day/week/pound {etc} and a half
一天/星期/磅{等}半
half a dozen
半打
half an hour
半小时
half past three/four {etc}
三/四{等}点半
half three/four {etc}
 [BRIT] [inf] 三/四{等}点半
he was drunk half the time
 [inf] 他大部分时候都是喝醉的
to be half German/Irish {etc}
有一半德国/爱尔兰{等}血统的
half as much (as)
…的一半
to go halves (with sb on sth)
(与某人)平摊(某物的费用)
she never does things by halves
她做事总是很彻底的
she's half his age
她的年龄是他的一半
he's too clever by half!
他聪明过头了!