be fun to do和be fun doing的区别
be fun doing 和have fun doing的区别
有没有be fun with,be fun to do和be fun doing这些说法?
be fun to do sth 和have fun doing sth 有什么区别 加 例句
请问下后面接的动词形式(to do/doing):have fun+ be/have good
it is fun to do和it is fun doing区别
词组have fun doing和have fun to do有什么区别
be careful doing和be careful to do的区别?
be easy to do和 be easy doing 的区别
be going to do 和be doing用法的区别?
be doing和be going to do的区别
be afraid to do 和 be afraid doing 的区别?
be to do和be doing的区别