It's great fun to play with them.是什么句型?fun是什么词性?能多举几例吗?

It's great fun to play with them.是什么句型?fun是什么词性?能多举几例吗? great fun 中fun的词性是什么 fun 是什么词性It is gueat fun 中great fun 可以用interesting代替吗 It's fun to have English class中fun是什么词性? It's fun to learn a foreign language.中fun是什么词性? I think it's great fun to () them. It's great ______ to play with my pet(fun funny) 句型转换 It's great fun to go camping with some friends in sprin It is fun to do sth.句型fun的词性 I think it's great fun to （ ） them.A join B join in C play D It's fun to do sth.中的fun什么词性 It is___(fun)to play with cats