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使用現(xiàn)在分詞的幾種情況
1.進行時態(tài)。如：
He is playing computer games in the room.
They were chatting in the sitting room at nine o'clock last night.
簡單的來說，現(xiàn)在分詞用作進行時態(tài)時，即在be動詞（am,is,are或was,were）后面加doing，但需要注意的是，有時be動詞后面接動詞的被動式，這就需要我們對于語境的正確把握。
2.there be結構。如：
There is a girl dancing on the stage.
意為“有……在做……”，其實這一結構也可以看做第一種情況的一種。
3.介詞后面。如：
Thanks for helping me.
Are you good at playing basketball.
4.以下結構中：
enjoy doing sth 樂于做某事
finish doing sth 完成做某事
feel like doing sth 想要做某事
stop doing sth 停止做某事
forget doing sth 忘記做過某事
go on doing sth 繼續(xù)做某事
remember doing sth 記得做過某事
like doing sth 喜歡做某事
keep sb doing sth 使某人一直做某事
find sb doing sth 發(fā)現(xiàn)某人做某
have fun doing sth 做某事充滿樂趣
have problem doing sth 做某事有困難
hear/watch sb doing sth 看到/聽到/觀看某人做某事
try doing sth 試圖做某事
need doing sth 需要做某事
prefer doing sth 寧愿做某事
mind doing sth 介意做某事
practice doing sth 練習做某事
be busy doing sth 忙于做某事
can't help doing sth 禁不住做某事
miss doing sth 錯過做某事
5.to do vs. doing
(1) forget to do sth 忘記要做某事（還未做）
forget doing sth 忘記做過某事（已做了）
例： He forgot to turning the light when he left the classroom last night. (他昨晚離開教室時忘記關燈了。)
He forgot turning the light when he left the classromm last night. (他忘記他昨晚離開教室時已經把燈關了。)
(2) remember to do sth 記得去做某事（還未做）
remember doing sth 記得做過某事（已做了）
例： Remember to go to the post office after school. (放學后記得去趟郵局。)
I remember going to the post office after schoool. (我記得我放學后去過郵局了。)
以上兩個單詞都有兩種用法，要牢記其不同用法的不同意思，結合語境正確應用。
下面， 讓我們做一個題感受一下吧
——The light in the classroom is still on.
——Oh, I forgot _________ .
A. turning it off B. turn it off C. to turn it off D. having turned it off
答案與解析：由第一句可知燈還亮著，那么燈是忘記關了。而forget to do sth意為忘記要做……，所以應當選C，忘記關燈了。