begin,start后面可以加to do或Ving,表达的意思一样吗,如有区别,区别是什么?

begin to do sth 开始做某事 ; 开始做
例如：Had the first person that has crab ,buy the home people begin ready to do sth.
有了第一个吃螃蟹的人,买家们开始蠢蠢欲动.
begin doing sth 开始做某事 ; 开始做
例如：You begin doing your homework now .
你们现在可以做家庭作业.
start to do sth 开始做某事 ; 开始做
例如：What did the bear's family start to do as the rain came
雨来临的时候,小熊一家开始做什么?
start doing 开始做
例如：Well ,stop talking about it and start doing it .
好啦,停止谈论,开始动工吧.