start doing sth=start to do sth.
意思是：开始做某事
start becoming= start to become
意思是：开始变得
一般过去时要把start 变成started,就成了started becoming
started becoming什么意思?是什么句式吗?
start doing sth=start to do sth.
意思是：开始做某事
start becoming= start to become
意思是：开始变得
一般过去时要把start 变成started,就成了started becoming