1、所修饰词不同
how much用来修饰不可数名词，表示数量，也可单独使用。
how many用来修饰可数名词的复数，它的句式是:How many+复数名词+一般疑问句+?
例句：How much milk is there in the glass?
玻璃杯里有多少牛奶?
How many books are there on the desk?
有多少本书在桌子上?
2、用法不同
How much表示多少钱，用来问价格。例句：How much is this dress?这个连衣裙多少钱?
how many：many用作形容词时后接复数名词，表示许多同样的人或物(但数目不明确)，用作主语时，其谓语动词要用复数形式。常用于否定句中。
How many表示多少，用来问数量。例句：How many apples do you have?你有多少苹果?
how much：much用作副词主要表示“程度”，意为“非常，很，大大，更加，…如何”，多修饰动词(可放于其前或其后)，也常修饰形容词或副词的比较级或最高级和分词。一般用于疑问句或否定句。
简明释义
much：英[mʌtʃ]；美[mʌtʃ]
adv.很；非常；更加
det./pron.(与不可数名词连用，尤用于否定句；或与how连用以询问数量；也可与as、so和too连用)许多，大量，多少
n.许多
adj.许多的；大量的；很大程度的
比较级：more
最高级：most
many：英[ˈmeni]；美[ˈmeni]
adj.许多的，大量的
pron.许多人（或物），许多（尤用于否定句或正式用语，表示大量）
det.许多的，大量的；多少（用于疑问句以询问数字大小）；许多，很多
n.多数人（东西），大多数人；民众，百姓
adv.（回答有关数量的提问时）多
比较级：more
最高级：most
how much双语例句
1、Just out of interest,how much did it cost?
我只是好奇问问，这个花了你多少钱？
2、How much will it cost,more or less?
这个大概得花多少钱？
3、How much water do you need?
你要多少水？
4、How much does it cost to become a member?
要成为会员得花多少钱？
5、How much will you give me for the car?
你肯出多少钱买我这辆汽车？
6、How much did you get for your car?
你的汽车卖了多少钱？
7、I can't believe how much better I feel.
真想不到我觉得好多了。
8、I didn't know how much to bring.
我不知道该带多少。
9、How much is my share of the take?
我的那一份收入是多少？
10、How much money do we need to do the job properly?
我们需要多少钱才能做好这件事？
11、How much are these?They don't have a price on them.
这些东西卖多少钱？它们都没有标价。
12、How much disk space will it take up?
这会占用多少磁盘空间？
13、The question is,how much are they going to pay you?
问题是他们打算付给你多少钱？
14、How much further is it?
还有多远？
15、How much experience have you had?
你经验如何？
16、How much does it read on the scale?
刻度显示的是多少？
17、How much does she bring in now?
她现在挣多少钱？
18、How much did it cost?
这东西要多少钱？
19、'How much was it?''You don't want to know'.
“这要多少钱？”“你还是不知道的好。”
20、Everyone was clamouring to know how much they would get.
大家都吵闹着想知道他们能得到多少。
how many双语例句
1、How many countries took part in the last Olympic Games?
有多少国家参加了上届奥运会？
2、How many candidates are standing for election?
有多少候选人参加竞选？
3、How many people were there?
有多少人？
4、How many days did you take off?
你休了几天假？
5、How many children do you have?
你有几个孩子？
6、Please let me know how many are coming,if any.
请告诉我，如果有人要来的话，有多少？
7、Whether we need more food depends on how many people turn up.
我们是否需要更多的食物，这要视到场人数而定。
8、How many people came to the meeting?
多少人来参加了会议？
9、How many subjects are you taking this year?
你今年修多少门课？
10、How many times do I have to tell you not to do that?
我得跟你说多少回不要做那种事？
11、In terms of extra staff─how many will we need?
就额外的员工来说，我们需要多少人？
12、How many people were there at the concert?
音乐会上有多少人？
13、How many people does the company employ?
这个公司雇用了多少人？
14、How many students have been entered for the exam?
有多少学生报名参加考试？
15、How many driving lessons have you had so far?
你到目前为止上过多少节驾驶课了？
16、How many stairs are there up to the second floor?
上到第三层一共有多少磴楼梯？
17、How many sets of prints would you like?
你想洗几套照片？
18、How many pupils does the school have?
这所小学有多少学生？
19、How many people are they going to try and squash into this bus?
他们打算把多少人塞进这辆公共汽车？
20、How many factory workers are in danger of losing their jobs?
有多少产业工人可能失业？