1)stop to do 表示“停下来(正在做的事情)开始做别的事情”,stop为不及物动词,不定式to do在句中作状语,表示停下来的目的.stop doing表示“停止干某事(即正在做的事)”,stop为及物动词,doing作stop的宾语,表示所停止的事情.试比较：
①Every half an hour my uncle would stop to have a smoke.
每半小时我叔叔就会停下来抽支烟.(不能说…stop having…)
②Why are you still playing games here?Stop to work!你们为什么还在这儿玩?停下来去干活!(不能说 Stop working!)
③As soon as Bob saw me,he stopped talking to his girl friend and came over.
鲍勃一看到我就停止和他女友说话,走了过来.(不能说…stopped to talk…)
④It's really high time for you to stop smoking.
你确实该戒烟了.(不能说…stop to smoke.)
2)remember to do表示“记住要做某事”,不定式作宾语,指要做的事情.remember doing表示“记得做过某事”,doing作宾语,指以前做过的事情.
试比较：
①Remember to turn off the lights when you leave the room.记住离开房间时要关灯.(灯还没关,是个未来的动作,不能说Remember turning off…)
② I must remember to tell him about her.我得记住把她的情况告诉他.
(还没告诉,未来动作,不能说…remember telling…)
③ I remember turning off the lights when I left the room.我记得我离开房间时把灯熄了.(灯已熄,指过去的动作,不能说 I remember to turn off…)
④I remember telling him about her that day.我记得那天告诉过他她的情况.(已告诉,指过去动作,不能说I remember to tell…)
3)forget to do表示“忘记做某事”,不定式作宾语,指要做的事情.forget doing表示“忘了做过某事”,动词-ing形式作宾语,指过去所做过的事情.
试比较：
①I'm sorry I forgot to post your letter.对不起,我忘了给你寄信了.(信没发,post动作没发生,不能说…forgot posting…)
4)try to do,意思是作一番努力,试图做某件困难的事.try doing表示试试做某件事情,看看会发生什么情况.试比较：
①I once tried to learn Japanese.我曾试着学会日语.(表示一种企图,但没学会.)
②It is unwise for people to try repairing their own electrical appliances.
5)like to do与like doing的区别不大,前者表一次性动作,而后者表经常性、习惯性动作.
只接动名词（v－ing）作宾语的动词及固定结构：advise,appreciate,enjoy,delay,escape,finish,keep,imagine,mind,practise,risk,suggest,excuse,miss,avoid,complete,permit,prove等.Put off,spend some time in,keep(on),feel like,be busy,give off,be worth,be used to,can’t help,waste time(in),have difficulty in,what/how about,have a good time in,look forward to,devote to,pay attention to,stick to,insist on.
只接不定式（to do）的动词,如：afford,agree,claim,choose,decide,demand,desire,determine,be determined,fail,hope,manage,offer,plan,prepare,pretend,promise,refuse,seek,resolve（决心）,threaten,wish,arrange,undertake（答应）,volunteer （志愿）,learn,etc.