how much与how many的区别在于：how many 后接可数名词复数形式,而how much 后接不可数名词.例如：
－How many people are there in your family?你家有几口人?
－There are five.五口人.
－How many birds can you see in the picture?图画中你能看见多少只鸟?
－Only one.仅看见一只鸟.
how much 是一个常见的特殊疑问词组,它的意思为“多少”,表示数量,其后面接不可数名词,也可单独使用,它在初中课本里的用法主要有：
1、用来询问事物的数量,后接不可数名词.例如：
How much milk is there in the glass?玻璃杯里有多少牛奶?
How much bread is there on the table?桌子上有多少面包?
2、用来询问事物的重量.例如：
－How much do you want to buy?你想要买多少?
－Two kilos.两公斤.
－How much does the pig weigh?这头猪多重?
－Eighty kilos.八十公斤.
3、用来询问数字计算的结果,相当于what.例如：
－How much is three plus one?三加一等于多少?
－It's four.等于四.
－How much is eight minus three?八减三等于多少?
－It's five.等于五.
4、how much 意为“多少钱”时,可单独使用,也可构成词组how much money,但英语中常省略money,用来询问某物的价钱、价格.例如：
How much is your new computer?你的新电脑多少钱?
How much (money ) did you pay for the English grammar book?买这本英语语法书,你付了多少钱?
注意：（1）how much 后接be动词时,be 是单数还是复数,取决于be之后的名词.例如：
－How much are the parrots?这些胡萝卜多少钱?
－Two yuan a kilo.两元一公斤.
－How much is this coat 这件大衣多少钱?
－One hundred and fifty-three yuan.一百五十三元.
（2）how much询问价格时,它的回答若是中国的货币单位应采用汉语拼音yuan,fen来表示,几角常采用几十分来表示,字母用小写,且不用复数.例如：
－How much is the eraser?这块橡皮擦多少钱?
－Ninety two fen.九角二分.
（3）在买卖过程中,买方觉得太贵不买,常用That's much too dear.作答.如果觉得比较合适,常用That's (very,quite) cheap.
Fewer和less分别是few和little的比较级形式.要了解less和fewer的区别,就请记住名词有可数不可数之分.可数名词有复数形式,比如
"pencils"、"airplanes"还有"games".不可数名词则没有复数形式,比如"money"、"water"、
"hear".在可数名词前用few或者fewer,而在不可数名词前用little或者less.
I bought fewer DVDs this time since I didn't have much money on me.
由于身边带的钱不多,我只买了几部影碟.
There was less noise in the room after the speech ended.
当演讲结束后,房间里安静了许多.
A few books were left on the table.
桌上只留下了几本书.
Can you get a little sugar out of the cabinet?
你能从橱柜里拿些糖出来吗?
然而还要知道,一般认为fewer更正式一点,所以你可能听见人们在可数和不可数名词之前都用less.口语中这样使用不能算错,但是在书写、或者正式讲话中人们会注意这点,并认为这是错误的用法.
虽然多了一些,但你还是看一下比较好,应该有用.