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①修饰可数名词：many,a large number of,many a,
②修饰不可数名词：much,a great deal of,
③既修饰可数名词又可以修饰不可数名词：a large quantity of,lots of ,plenty of,
等等.具体规则如下：
修饰可数名词.表示“许多”的词和词组有：many,a great／good many,a great／large／small number of,scores of,dozens of.eg:
There are many people in the park．公园里有许多人.
I'm quite busy；I have a great many things to do．我非常忙,我有很多事情要做.
She bought dozens of eggs yesterday morning．她昨天上午买了许多鸡蛋.
I have heard that scores of times．那件事我已听过很多遍了.
注意：1．many用作代词,表示“许多人,许多”的意思.
Many of them have left for the countryside．他们中有许多人到农村去了.
2．Many a／an也表示“很多的,许多的”的意思,后接可数名词单数,谓语动词用单数形式.
Many a young man wants to speak English．许多年轻人想说英语.
3．a great／good many用作代词,表示“很多东西／人”的意思.
A great many of them are out of work．他们中的很多人失业了.
4．the number of．．．表示“．．．的数目”’谓语动词用单数形式.
The number of books missing from the school library is large．学校图书馆丢失书的数目很大.
二、修饰不可数名词.表示“许多”的词和词组有：much,a great／good deal of,a large／small amount of.
There is a great deal of snow on the ground．地面上有很多雪.
I have spent a good deal of time／money on stamp collecting．我在集邮上花费了很多时间／钱.
A million dollars is a large amount of money to me．100万美元对我来说是一笔钱.
There is only a small amount of food．只有一点食物.
注意：1．much用作代词,表示“许多,大量”的意思.
I couldn't write much into day's exam．在今天的考试中我没答出多少.
2．a great／good deal用作代词,表示“很多,大量”的意思.
He ate a great deal．他吃了很多.
3．a great／good deal用作副词,作状语,修饰形容词,特别是形容词比较级,意思是“非常,．．．得多”；也可修饰动词,意思是“很多”.
He ran a good deal faster than I.他跑得比我快得多.
“Do you walk much?”“Yes,a good deal．”“你常步行吗?”“是的,次数很多.”
4．the amount of．．．作主语时,谓语动词用单数形式.
The amount of money spent on the bridge was large．这座桥耗资巨大.
5．1arge amounts of．．．作主语时,谓语动词要用复数形式.
Large amounts of money were spent on the bridge．建这座桥花费了大量资金.
三、修饰可数名词,也可修饰不可数名词.表示“许多”的词组有；a lot of,lots of,plenty of,a great／1arge／small quantity of,
A lot of／Lots of people went swimming yesterday．昨天很多人去游泳.
A lot of／Lots of work is to be done this week．本周将有许多工作要做.
We have plenty of cakes．Take some more．我们有很多蛋糕,多吃些吧!
Don't hurry．There is plenty of time．不用急,还有充足的时间.
注意：1．a lot用作名词,表示“很多,多数”的意思.
He knew a lot about it.关于那件事他知道得很多.
2．a lot用作副词,修饰形容词和动词,表示“非常,相当”的意思.
He is feeling a lot better today．他今天感觉好多了.
I like him quite a lot．我非常喜欢他.
She laughed a lot．她笑得很厉害.
3,plenty of只用于肯定句,在疑问句或否定句中一般用enough表示“足够”.
Do you have enough time?你的时间够用吗?
They don't have enough time．他们没有足够的时间.
4,a large(great,small)quantity of后面跟不可数名词,亦可跟可数名词的复数.跟不可数名词时,谓语动词要用单数形式；跟可数名词的复数时,谓语动词要用复数形式.
A small quantity of water is needed．需要少量的水.
There are a large quantity of flowers in the garden．庭园里有很多花.
5．great／large quantities of无论跟不可数名词,还是跟可数名词的复数,谓语动词都要用复数形式.
Large quantities of food were on the table．桌子上有很多食物.
①修饰可数名词：many,a large number of,many a,
②修饰不可数名词：much,a great deal of,
③既修饰可数名词又可以修饰不可数名词：a large quantity of,lots of ,plenty of,
等等.具体规则如下：
修饰可数名词.表示“许多”的词和词组有：many,a great／good many,a great／large／small number of,scores of,dozens of.eg:
There are many people in the park．公园里有许多人.
I'm quite busy；I have a great many things to do．我非常忙,我有很多事情要做.
She bought dozens of eggs yesterday morning．她昨天上午买了许多鸡蛋.
I have heard that scores of times．那件事我已听过很多遍了.
注意：1．many用作代词,表示“许多人,许多”的意思.
Many of them have left for the countryside．他们中有许多人到农村去了.
2．Many a／an也表示“很多的,许多的”的意思,后接可数名词单数,谓语动词用单数形式.
Many a young man wants to speak English．许多年轻人想说英语.
3．a great／good many用作代词,表示“很多东西／人”的意思.
A great many of them are out of work．他们中的很多人失业了.
4．the number of．．．表示“．．．的数目”’谓语动词用单数形式.
The number of books missing from the school library is large．学校图书馆丢失书的数目很大.
二、修饰不可数名词.表示“许多”的词和词组有：much,a great／good deal of,a large／small amount of.
There is a great deal of snow on the ground．地面上有很多雪.
I have spent a good deal of time／money on stamp collecting．我在集邮上花费了很多时间／钱.
A million dollars is a large amount of money to me．100万美元对我来说是一笔钱.
There is only a small amount of food．只有一点食物.
注意：1．much用作代词,表示“许多,大量”的意思.
I couldn't write much into day's exam．在今天的考试中我没答出多少.
2．a great／good deal用作代词,表示“很多,大量”的意思.
He ate a great deal．他吃了很多.
3．a great／good deal用作副词,作状语,修饰形容词,特别是形容词比较级,意思是“非常,．．．得多”；也可修饰动词,意思是“很多”.
He ran a good deal faster than I.他跑得比我快得多.
“Do you walk much?”“Yes,a good deal．”“你常步行吗?”“是的,次数很多.”
4．the amount of．．．作主语时,谓语动词用单数形式.
The amount of money spent on the bridge was large．这座桥耗资巨大.
5．1arge amounts of．．．作主语时,谓语动词要用复数形式.
Large amounts of money were spent on the bridge．建这座桥花费了大量资金.
三、修饰可数名词,也可修饰不可数名词.表示“许多”的词组有；a lot of,lots of,plenty of,a great／1arge／small quantity of,
A lot of／Lots of people went swimming yesterday．昨天很多人去游泳.
A lot of／Lots of work is to be done this week．本周将有许多工作要做.
We have plenty of cakes．Take some more．我们有很多蛋糕,多吃些吧!
Don't hurry．There is plenty of time．不用急,还有充足的时间.
注意：1．a lot用作名词,表示“很多,多数”的意思.
He knew a lot about it.关于那件事他知道得很多.
2．a lot用作副词,修饰形容词和动词,表示“非常,相当”的意思.
He is feeling a lot better today．他今天感觉好多了.
I like him quite a lot．我非常喜欢他.
She laughed a lot．她笑得很厉害.
3,plenty of只用于肯定句,在疑问句或否定句中一般用enough表示“足够”.
Do you have enough time?你的时间够用吗?
They don't have enough time．他们没有足够的时间.
4,a large(great,small)quantity of后面跟不可数名词,亦可跟可数名词的复数.跟不可数名词时,谓语动词要用单数形式；跟可数名词的复数时,谓语动词要用复数形式.
A small quantity of water is needed．需要少量的水.
There are a large quantity of flowers in the garden．庭园里有很多花.
5．great／large quantities of无论跟不可数名词,还是跟可数名词的复数,谓语动词都要用复数形式.
Large quantities of food were on the table．桌子上有很多食物.