连词成句 is ,thst ,man ,who ) 句型转换 That is my key.（改为否定句） That ( ) ( ) my key.

连词成句 is ,thst ,man ,who )
who is that man?
句型转换 That is my key.
That key is mine.
（改为否定句） That ( ) ( ) my key.
That (is ) (not ) my key.