1 stop doing/to do
stop to do 停止，中斷做某事後去做另一件事。
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. 我必須戒菸了。
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。
2 forget doing/to do
forget to do 忘記要去做某事。 (未做)
forget doing 忘記做過某事。(已做)
the light in the office is stil on. he forgot to turn it off.
辦公室的燈還在亮著，它忘記關了。(沒有做關燈的動作)
he forgot turning the light off.
他忘記他已經關了燈了。 ( 已做過關燈的動作)
don't forget to come tomorrow.
別忘了明天來。 (to come動作未做)
典型例題
---- the light in the office 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：c。由the light is still on 可知燈亮著，即關燈的動作沒有發生，因此用forget to do sth.
而forget doing sth表示燈已經關上了，而自己忘記了這一事實。此處不符合題意。
3 remember doing/to do
remember to do 記得去做某事 (未做)
remember doing 記得做過某事 (已做)
remember to go to the post office after school.
記著放學後去趟郵局。
don't you remember seeing the man before?
你不記得以前見過那個人嗎?
4 regret doing/to do
regret to do 對要做的事遺憾。 (未做)
regret doing 對做過的事遺憾、後悔。(已做)
i regret to have to do this, but i have no choice.
我很遺憾必須這樣去做，我實在沒有辦法。
i don't regret telling her what i thought.
我不為告訴她我的想法而後悔。
典型例題
---you were brave enough to raise objections at the meeting.
---well, now i regret ___ that.
a. to do b. to be doing c. to have done d. having done
答案：d。regret having done sth. 對已發生的事感到遺憾。regret to do sth. 對將要做的事感到遺憾。本題為對已說的話感到後悔，因此選d。
5 cease doing/to do
cease to do 長時間，甚至永遠停做某事。
cease doing 短時停止做某事，以後還會接著做。
that department has ceased to exist forever.
那個部門已不復存在。
the girls ceased chatting for a moment when their teacher passed by.
姑娘們在老師走過時，停了會聊天。
6 try doing/to do
try to do努力，企圖做某事。
try doing 試驗，試著做某事。
you must try to be more careful.
你可要多加小心。
i tried gardening but didn't succeed.
我試著種果木花卉，但未成功。
7 go on doing/to do
go on to do 做了一件事後，接著做另一件事。
go on doing 繼續做原來做的事。
after he had finished his maths，he went on to do his physics.
做完數學後，他接著去做物理。
go on doing the other exercise after you have finished this one.
作完這個練習後，接著做其他的練習
8 be afraid doing/to do
be afraid to do 不敢，膽怯去做某事，是主觀上的原因不去做，意為"怕"；
be afraid of doing 擔心出現doing的狀況、結果。 doing 是客觀上造成的，意為"生怕，恐怕"。
she was afraid to step further in grass because she was afraid of being bitten by a snake.
她生怕被蛇咬著，而不敢在草叢中再走一步。
she was afraid to wake her husband.
她不敢去叫醒她丈夫。
she was afraid of waking her husband.
她生怕吵醒她丈夫。
9 be interested doing/to do
interested to do 對做某事感興趣，想了解某事。
interested in doing 對某種想法感興趣，doing 通常為想法。
i shall be interested to know what happens.
我很想知道發生了什麼事。 (想了解)
i'm interested in working in switzerland. do you have any idea about that?
我對在瑞士工作感興趣。你想過這事嗎? (一種想法)
10 mean to doing/to do
mean to do 打算、想
mean doing 意味著
i mean to go, but my father would not allow me to.
我想去，但是我父親不肯讓我去。
to raise wage means increasing purchasing power.
贈加工資意味著增加購買力。
11 begin(start) doing/to do
begin / start to do sth
begin / start doing sth.
1) 談及一項長期活動或開始一種習慣時，使用doing.
how old were you when you first started playing the piano?
你幾歲時開始彈鋼琴？
2) begin, start用進行時時，後面動詞用不定式to do
i was beginning to get angry。
我開始生起氣來。
3) 在attempt, intend, begin, start 後接know, understand, realize這類動詞時，常用不定式to do。
i begin to understand the truth。
我開始明白真相。
4) 物作主語時
it began to melt.
12 感官動詞 + doing/to do
感官動詞 see, watch, observe, notice, look at, hear, listen to, smell, taste, feel + do 表示動作的完整性，真實性；+doing 表示動作的連續性，進行性
i saw him work in the garden yesterday.
昨天我看見他在花園裡幹活了。(強調"我看見了"這個事實)
i saw him working in the garden yesterday.（強調"我見他正幹活"這個動作）
昨天我見他正在花園裡幹活。
典型例題
1）they knew her very well. they had seen her ___ up from childhood.
a. grow b. grew c. was growing d. to grow
答案：a。因題意為，他們看著她長大，因此強調的是成長的過程，而非正在長的動作，因此用see sb do sth 的句型。
2）the missing boy was last seen ___ near the river.
a. playing b. to be playingc. playd. to play
答案a. 本題強調其動作，正在河邊玩，應此用see sb. doing sth句型。