In spoken English, forms of have are often shortened, for example I have is shortened to I've and has not is shortened to hasn't.
在英语口语中 have 经常用缩略形式，如 I have 略作 I've，has not 略作 hasn't。
have 基本解释
1. have on : 穿着, 戴着；
2. have had it : 完了；
3. have to : [have got to] 不得不, 只好；
