问题描述：
It‘s just sad to watch him over the years,to regress like that and lose his feelings.
to regress like that and lose his feelings.作什么成分?是怎么回事?求句型分析!
to regress like that and lose his feelings.作什么成分?是怎么回事?求句型分析!
问题解答：
我来补答展开全文阅读