paul tried to use a knife to open the door.(改同义句）
问题描述：
paul tried to use a knife to open the door.(改同义句）
答
Paul made great effort to open the door with a knife.
try to do sth=make great effort to do sth,努力做某事
后面半句可以使用with来改写。
答
A knife be used by Paul to open the door.
答
Paul tried to open the door with a knife