可以说How many are these pens?要说“这些钢笔是多少支”对吗?

how many windows are there in your room?可不可以说how many windows in your room? 可以说how many of the students are from Shanghai and Beijing? 可以说How many are these pens?要说“这些钢笔是多少支”对吗? 英语翻译可以说how many hills you burnt? how many bears are How many derks are how many trees are how many books are 为什么可以说There are many fish 却不可以说There are many grass how many legs are there? how many stop are there How many pears are there? How many stars are there? How many birdges are there? HOW MANY BOOKS ARE THERE How many people are zhere? How many people are there? How many apples are these