事(动作已经发生) ? Don’t forget to lock the door when you leave. ? I forgot telling him the story. 我忘了已经告诉过他这件事了。Рremember to do sth 记得去干某事(动作尚未发生) ? remember doing sth. 记得干了某事(动作已经发生)Рtry to do sth. 尽力、努力去做某事? try doing sth 尝试去做某事? 例:He try to finish all the homework before dinner time. ? -I usually go there by train. -Why not try going by? boat for a change?? --我通常乘火车去那儿。--为什么不换乘船呢? Рsee/ find/watch/hear sb. do sth. ? 看见/发现/观看/听见某人做了某事(表全过程,或经常性)? see/find/watch/hear sb. doing sth. ? 看见/发现/观看/听见某人正在做某事? 例: I often see her read books in the library. ? I saw her reading books in the library yesterday.Р练习: 用所给的适当形式填空.?1. We watched them ________ (get) off the bus, ? __________ (cross) the street and _________ ? (disappear) among the people.?2. Suddenly we heard someone __________ (cry) for ? help.
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