有同学问how many后面跟单数还是复数？【答】how many后面跟复数。

how many+ 可数名词复数形式
例句：
How many books do you have?
你有多少本书？
How many children are playing in the park?
有多少位孩子在公园里玩？
How many cats are in the shop?
商店里有多少只猫？
How many cars are blue?
有多少辆车是蓝色的?
How many apples are put in the fridge?
有多少只苹果被放在冰箱里面。

所以，请一定要记住how many后面跟复数名词。同时须搞懂的知识：how many how much区别