在新概念英语第二册第39课课文Am I all right？里有一句
While John Gilbert was in hospital， he asked his doctor to tell him whether his operation had been successful， but the doctor refused to do so.当约翰.吉尔伯特住院的时候，他问医生他的手术是否成功，但医生拒绝告诉他。
这句话里隐含着这么几个信息，一是，他动了手术（ He had an operation. ）就是， John Gilbert was in hospital.He had an operation. 吉尔伯特住院动了手术。
他动了手术后，担忧手术是不是成功，于是他不停地老是问医生手术如何，所以当while引起的从句，主句动作隐含着重复，例如，
While we were waiting to land， a flight attendant told us to keep calm and to get off the plane quietly as soon as it had touched down.
在我们等待降落时，一位空中乘务员告诉我们要保持镇静，待飞机一着陆，就马上不声不响地离开飞机。
例子中，空中乘务员告诉我们要保持镇静，这个告诉动作不会只是说一句，而是多次重复。
当这位病人老是问医生手术如何，医生就会变得不耐烦了，所以用do so描述这位病人每次都问医生手术如何的情况，do so含义是，每次都是这样，具体这样看上下文。
面对病人老是问医生手术如何，医生每次都拒绝回答。
经典新概念英语，不要小看它，仔细琢磨，很有味道。
While John Gilbert was in hospital， he asked his doctor to tell him whether his operation had been successful， but the doctor refused to do so.当约翰.吉尔伯特住院的时候，他问医生他的手术是否成功，但医生拒绝告诉他。
这句话里隐含着这么几个信息，一是，他动了手术（ He had an operation. ）就是， John Gilbert was in hospital.He had an operation. 吉尔伯特住院动了手术。
他动了手术后，担忧手术是不是成功，于是他不停地老是问医生手术如何，所以当while引起的从句，主句动作隐含着重复，例如，
While we were waiting to land， a flight attendant told us to keep calm and to get off the plane quietly as soon as it had touched down.
在我们等待降落时，一位空中乘务员告诉我们要保持镇静，待飞机一着陆，就马上不声不响地离开飞机。
例子中，空中乘务员告诉我们要保持镇静，这个告诉动作不会只是说一句，而是多次重复。
当这位病人老是问医生手术如何，医生就会变得不耐烦了，所以用do so描述这位病人每次都问医生手术如何的情况，do so含义是，每次都是这样，具体这样看上下文。
面对病人老是问医生手术如何，医生每次都拒绝回答。
经典新概念英语，不要小看它，仔细琢磨，很有味道。
