we have a foolproof,no-cook frosting中的"frosting"为什么要加ing?

we have a foolproof,no-cook frosting中的frosting为什么要加ing? foolproof啥意思? We have a show we have a good We have a new we have a good we have a happiness We will have a miracle We will have a miracle we have a classroom?we have a classroom.没有问号 We [ ](have)a party today we have a good time! shall we have a competition? We have a new frirnd We ______________(have)a class. ( ))shall we have a pcnic we'll have a ( ) tomorrow. We Have A Dream 歌词 do we have a deal?