四连词"的原则。

　　一改：指改变语序；

　　二换：即换said为asked；

　　三变化：指人称、时态、状语变化；

　　四连词：即直接引语为一般疑问句时，间接引语中应用whether/if引导；直接引语为特殊疑问句时，间接引语仍用原来的疑问词引导。

　　　[即时演练3]　

　　(1)句型转换(每空一词)

　　①He asked, "Who cured you of your toothache？"

　　→He asked me who had cured me of my toothache.

　　②He asked me, "What do you do on weekends？"

　　→He asked me what I did on weekends.

　　③She asked me, "Why are you laughing at me？"

　　→She asked me why I was laughing at her.

　　(2)(2015·湖南高考)You have to know ________ you're going if you are to plan the best way of getting there.

　　A．what　　　　　　　　 B．that

　　C．where D．who

　　解析：选C　句意：你如果要计划到达那里的最好的方法，就得知道自己要去哪里。分析句子结构可知，know后面是宾语从句，且引导词在从句中作地点状语，故用where。

　　4．引述祈使句通常用"动词＋宾语＋不定式"结构。如果祈使句为否定句，要在不定式的前面加上not。引述表示命令的祈使句，常用动词order, tell, warn；引述表示请求的祈使句常用动词ask, beg；引述表示建议、劝告的祈使句常用动词advise等。

　　He said, "Please come here again tomorrow."

　　→He asked me to go there again the next day.

　　他让我第二天再到那儿去。

　　He said, "Do have a look yourself first."

　　→He advised me to have a look myself first.

　　他建议我自己先看一看。

　　He said, "Don't make so much noise, boys."

　　→He told the boys not to make so much noise.

　　他叫那些男孩不要弄出那么多的噪音。

　　[巧学助记]　祈使句变间接引语，遵循"一改、二变、三加、四去"原则：

一改：said (to)改为asked或told