much加不可数名词,如much milk
many加可数名词复数,如many apples
How many加可数名词复数,如How many pears
How much加不可数名词,如How much water
How much也可用于问价钱,如How much are the apples?意思是这些苹果多少钱?这是How many与How much的最大区别