在英语中，询问数量时，根据名词的可数性和不可数性，选择使用"How many"或"How much"。例如，"How many"用于可数名词，如人、书或苹果等，而"How much"用于不可数名词，如水、糖或时间等。询问频率时，使用"How often"。
常见的用于询问数量的疑问词包括：
How many
"How many" 是一种常用的疑问词，用于询问数量。它通常用于可数名词，如人、书或者苹果等。例如：
- How many people are attending the party?
- How many books do you have at home?
- How many apples did you buy?
How much
"How much" 也是一种常用的疑问词，用于询问数量。它通常用于不可数名词，如水、糖或者时间等。例如：
- How much water do you drink every day?
- How much sugar do you need for this recipe?
- How much time do we have left?
How often
"How often" 是一种用于询问频率的疑问词。虽然它不是直接询问数量的疑问词，但在某些情况下，它也可以用于询问数量。例如：
- How often do you go to the gym in a week?
- How often do you eat fast food in a month?
- How often do you travel abroad in a year?
