start to do和start doing区别

start to do sth  VS. start doing sth. 开始做某事

两者常可换用，但有些许差别：

 强调开始长期或习惯性活动，多用doing;

 强调某次具体动作，多用to do

I was five when I first started playing the piano.

我五岁的时候开始弹钢琴。（可能弹钢琴很久了）

He sat down at the piano and started to play.

他坐在钢琴旁，开始弹奏。（描述具体动作）

主语是物不是人时，多用to do

The car started to move. 汽车开始移动。

常见搭配：

1）be starting to do sth. 

   She is starting to get angry. 她开始生气了。

2）start to understand/realize…

He started to realize how important this was.

他开始意识到这有多重要。