have有两种用法一实意动词 重读 不可缩合有have a book 吃have lunch 开have a meeting 洗have a bath 上have an English class看have a look 休息have a rest 等等二助动词 弱读 还可缩合I'vehe'shaven't hasn't han'tyou've they'vehave+ed分词 完成时态have been doing部分完成仍在进行时态have to do迫不得已被逼无奈 不得不had better do（威胁性）最好应该，只用于上级对下级（无词形变化）...
