必须跟复数。how many后面的名词及谓语动词都要用复数，它是修饰可数名词的。句式：How many+复数名词+一般疑问句。

howmany+可数名词复数形式

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howmany后面跟复数名词。

how many双语例句

How many candidates are standing for election?

有多少候选人参加竞选？

How many people were there?

有多少人？

How many days did you take off?

你休了几天假？

How many children do you have?

你有几个孩子？