1.half可直接修饰名词,这个名词既可以是复数,也可以是单数。例如:
Half the apples are bad.这些苹果中有一半是坏的。
Half the apple is bad.这个苹果一半是坏的。
2.half of后跟名词时,这个名词前应有the,this,my等限定词修饰,这时of也可省略.例如:
Half (of) the people are from England.
这些人中有一半是英国人。
Half (of) the students in that school are from the countryside.
那个学校有一半学生来自农村。
3.half of后也可接代词,这时of不能省略.例如:
Half of them enjoyed the party last night.
他们中有一半人喜欢昨晚的晚会。
Only half of them came last Sunday.
上星期天他们中只有一半人来了。
4.在谈论距离、长度和数量时,要用half,一般不用half of.例如:
His old house is half a mile down the road.
他的旧居在沿着这条路往下走半英里的地方。
Mr Smith drank half a bottle of whisky last night.
史密斯先生昨晚喝了半瓶威士忌酒。
5.half也可用作副词.例如:
I half agree with you.我不完全同意你的意见。
This meal is only half-cooked.
这顿饭做得只有半熟。