try doing/to do

try to do　　努力，企图做某事。
try doing　 试验，试着做某事。
You must try to be more careful.
　你可要多加小心。
I tried gardening¹ but didn"t succeed.
我试着种果木花卉，但未成功。
 
 
go on doing/to do

go on to do　做了一件事后，接着做另一件事。
go on doing　 继续做原来做的事。
After he had finished his maths，he went on to do his physics.
做完数学后，他接着去做物理。
Go on doing the other exercise after you have finished this one.
作完这个练习后，接着做其他的练习
 
 
be afraid doing/to do

be afraid to do　不敢，胆怯去做某事，是主观上的原因不去做，意为"怕"；
be afraid of doing　担心出现doing的状况、结果。 doing 是客观上造成的，意为"生怕，恐怕"。
She was afraid to step further in grass because she was afraid of being bitten by a snake.
她生怕被蛇咬着，而不敢在草丛中再走一步。
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。
 
 
be interested doing/to do

interested to do　　 对做某事感兴趣，想了解某事。
interested in doing　 对某种想法感兴趣，doing 通常为想法。
I shall be interested to know what happens.
我很想知道发生了什么事。 (想了解)
I"m interested in working in Switzerland. Do you have any idea about that?
我对在瑞士工作感兴趣。你想过这事吗?　 (一种想法)
 
 
mean to doing/to do

　mean to do　 打算、想
　mean doing　意味着
　I mean to go, but my father would not allow me to.
　我想去，但是我父亲不肯让我去。
　To raise wage means² increasing purchasing power.
　赠加工资意味着增加购买力。
 
 
begin(start) doing/to do

begin / start to do sth
　begin / start doing sth.
1)　谈及一项长期活动或开始一种习惯时，使用doing.
　 How old were you when you first started playing the piano?
　 你几岁时开始弹钢琴？
2)　begin, start用进行时时，后面动词用不定式to do
　　I was beginning to get angry。
　　我开始生起气来。
3)　在attempt, intend, begin, start 后接know, understand, realize这类动词时，常用不定式to do。
　　I begin to understand the truth。
　　我开始明白真相。
4)　物作主语时
　　It began to melt