Question

Why not________on the heater since it's so cold here？

1. A.
   you turn
2. B.
   to turn
3. C.
   turning
4. D.
   turn

Answer 1

D
分析：提出“建議”的句型why not意思是“干嗎不”，why not后面的動(dòng)詞用不帶to的動(dòng)詞不定式形式。(延伸)Why not do sth？是“建議”句型，因此不能用because來(lái)作反應(yīng)。應(yīng)該說(shuō)That's a good idea．對(duì)過(guò)去的事情是不可能發(fā)出“建議”的。下面是錯(cuò)句：Why not turn on the heater yesterday？應(yīng)該改為Why didn't you turn on the heater yesterday？此時(shí)要用because來(lái)回答問(wèn)題。(延伸)Why not do sth？(對(duì)雙方或?qū)��?duì)方發(fā)出建議)來(lái)源于Why don't we do sth？(對(duì)雙方發(fā)出建議)或Why don't you do sth？(對(duì)對(duì)方發(fā)出建議)