how many後面的名詞及謂語動詞都要用複數，它是脩飾可數名詞的。

how many people 多少人

how many tomatoes 多少番茄

how many cucumbers 多少黃瓜

how many onions 多少洋蔥

how many potatoes 多少土豆。

與之相反，how much後面的名詞為不可數名詞，謂語動詞則要用單數形式，例如：

how much brocolli 多少花椰菜

how much lettuce 多少萵苣。

又如：

How many cups of coffee do you drink every day?

你每天要喝多少杯咖啡呢？

How much coffee do you drink every day?

你每天要喝多少咖啡呢？