They are trying to repair it
问题描述：
They are trying to repair it
they are repairing it
这两句话都对吗?
两句话中的repair 都是动词吗?
答
是的,都是动词.都对
they are repairing it 用的是现在进行时,所以repair改为repairing .
They are trying to repair it 中有个短语：try to do sth,所以用repair.