Ⅰ. forget to do sth"表示忘記去做某事"(未做)
forget doing sth"表示忘記曾經做過某事(已做)"
① I forgot to tell him about it.
我忘了把事告訴他。
② I forgot telling him about it.
我忘了,我曾把這事告訴過他。
[注意]:類似的還有:
try to do sth"努力做某事"強調作出的努力
try doing sth"試著做某事,嘗試"強調用某種方法
1 Let’s try knocking at the back door..
讓我們敲敲後門試試看。
2 We will try to go home tomorrow.
明天我們爭取回家。
②remember to do sth"記得要做某事"
remember doing sth"記得做過某事"
regret doing sth/to do sth 與此亦同。
③ go on doing sth"繼續做(同一件)事"
go on to do sth "接著做(另一件)事"
④ need to do sth"必須(需要)做某事"表主動意義
need doing sth"必須(需要)做某事",表被動意義
want doing sth / to do sth. 與此相同。