begin(start)doing/todo

begin(start)doing/todo

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 melt¹.

重点词汇点拨

1 melt

v.（使）融化，（使）熔化，使软化，使感动

参考例句：

• If you warm ice,it will melt into water.如果你给冰加热它会融化成水。
• It is easy to melt ice.融化冰很容易。