half/hɑːf $ hæf/

n. one of two equal parts of sth

a. equal to half of sth/sb

ad. to the extent of half or partly

n. 〖复halves/hɑːvz $ hævz/〗 [C] 半，一半；半个：He cut the apple in half（或into halves）. 他把苹果切成两半。

◇The second half of the film is boring. 这部电影的后半部分很无聊。

◇Half of the books were missing. 有一半书不见了。

a. 半数的：Half the students chose A, the other half chose B. 一半学生选择A，另一半选择B。

◇half an hour = a half hour 半小时

◇two and a half years 两年半

ad. 到一半程度；部分地：His eyes were half closed. 他眼睛半闭着。

◇She was half asleep. 她半睡半醒。

常犯错误

✗ one and a half day

✗ one and half days

✓ one and a half days

✓ a day and a half 一天半

用法half of the people = half the people

常犯错误

✗ He cut the cake into half.

✓ He cut the cake into halves. 他把蛋糕切成两半。

常犯错误

✗ Half of them has found jobs.

✓ Half of them have found jobs. 他们中有一半人已经找到了工作。