8.1 stop doing/to do
?
stop to do 停止,中斷做某事后去做另一件事。
stop doing 停止做某事。
  They stop to smoke a cigarette.  他們停下來,抽了根煙。
  I must stop smoking.      我必須戒煙了。

典型例題
  She reached the top of the hill and stopped ___ on a big rock by the side of the path. 
A. to have rested B. resting  C. to rest D. rest
答案:C。由題意可知,她到了山頂,停下來在一個路邊的大石頭上休息。因此,應(yīng)選擇"stop to do sth. 停下來去做另一件事"。而不僅僅是爬山動作的終止,所以stop doing sth.不正確。