20. He has to canceI his appointment because..．他不得不取消他的约会，因为……
对话示例
— I am calling about your appointment with Mr. Clinton. He has to cancel his appointment because he must fly to New York now to deal with the problems about the contract for the company.
— When will he come back?
— About five days later. You can make an appointment on Friday.
— Well. Please arrange it for me.
— 我打电话来是想说你和克林顿先生预约的事。他不得不取消他的预约，因为他必须现在就飞往纽约，为公司解决有关合同的问题。
— 他什么时候能回来？
— 大约五天后。你们可以约在星期五。
— 那好吧。请帮我安排一下。
句型分析
He has to cancel his appointment because..．这个句型中的has to表明了这个约会的取消是因为客观存在的问题，because引导取消约会的原因。
句子示例
• He has to cancel his appointment because he has something urgent to deal with．他不得不取消他的预约，因为他有紧急的事情要处理。
• He has to cancel his appointment because he needs to execute the chairman's temporary request．他不得不取消他的预约，因为他需要执行董事长的临时要求。
• He has to cancel his appointment because all the flights are booked today．他不得不取消他的预约，因为今天所有的航班都预订完了。
重点单词
contract [ˈkɒntrækt] n．合同
urgent [ˈɜ:dʒənt] a．紧急的
execute [ˈeksɪkju:t] v．执行