两种结构start to do ; finish to do有没有 start to do sth.和 finish to do sth.这两种结构?

两种结构start to do ; finish to do有没有 start to do sth.和 finish to do sth.这两种结构? do you start to start to do 和 start doing 区别 start dong 还是start to do sth start to do 和start doing 那些结构中to do与doing的区别（start等） start+to do还是doing begin to do= start to do,start doing =start to do We don`t know when we shall start .(改为to do 的结构） We don`t know when ____ _____.说出语法！to start start to do与start doing 的区别 start to do 和start doing的区别 Start to do 和 start doing 的区别. start to do和start doing的区别? start doing和start to do 有什么区别 start doing 与start to do 的区别? start to do sth 和start doing什么不同 start doing 与start to do sth 有什么差别? start doing sth.和start to do sth.的区别