begin,start后面可以加to do或Ving,表达的意思相同么,有什么区别?

begin to do sth 开始做某事 ; 开始做
He began to do his homework 他开始做他的作业
begin doing sth 开始做某事 ; 开始做
He begins doing his homework now 他现在开始做他的作业
start to do sth 开始做某事 ; 开始做
When the dinner started,they started to do what thing 晚饭开始的时候,他们一家开始做什么事情
start doing 开始做
Okay,stop playing,start eating supper 好了,停止玩耍,开始吃晚饭吧