it is a great fun to do sth.
it is a great fun to do sth.
what great fun it is+to do sth 吗
It is great fun to do ...
It is fun to do sth造句
It is fun to do sth.造句.
It is fun to do sth.句型fun的词性
It is fun to do sth对,还是It is fun to doing sth
It is fun?到底是It is fun to do sth 还是It is fun doing sth?It is
what a great fun it is to go fishing和what great fun it is to
it is great fun +doing还是to do
What a great fun it is to go surfing; What great fun it is t
为什么能说What fun it is to do sth.却不能说How fun it is to do sth.