start to do 和start doing 的区别是?如题

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一样======以下答案可供参考======
供参考答案1:
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.
供参考答案2:
start to do是开始做上一件未做完的事 start doing是做完一件事开始做另一件事.
供参考答案3:
没有区别的供参考答案4:
没啥区别