2) 不可数名词
不可数名词不能用数字计算包括物质名词( air, water等)及抽象名词(advice, hate)等。所以它通常只有单数形式。如：English, air, water, cotton, work...
不可数名词表示数量时，可以用量词来表达(量词有复数形式)其结构是数词+量词+OF+名词。如：a bottle of water,two cups of tea,three pieces of paper
注意事项：
1．不可数名词没有复数变化，不能用A，AN，但可用THE，或不用冠词，如：bread is the usual breakfast.
2．虽然不可数名词没有复数变化，但量词超过一时要加复数。
如：three cups of coffee, five bottles of water
3．有量词修饰时注意名词是否可数，不可数时用单数，可数时用复数，如：ten bags of rice---- ten baskets of eggs
跟踪练习
I.找出下列笑话中的可数名词，并写出其复数形式：
In the market, a buyer asked a seller “How much is this cat, please?” “100 dollars.” “But you only asked for 20 dollars yesterday!” “Yes, that‘s true. But this cat ate a bird last night and the bird was worth 80 dollars!”
II.找出不可数名词，在横线上打勾，并将可数名词变成复数形式：
homework ______half ______advice______money ______
knowledge ______boot _____blood ______music ______
chicken ________heat _____mouth ______bread _______
information ______milk _____cow _______tear ________
III.选择填空：
1．The deer has four ______.
A. foot B. feet C. feets D. foots
2．Her two brothers are both ______.
A. policeman B. policemans C. policemen D. policemens
3．There are four _____ and two ______ in the group.
A. Japanese, Germen B. Japaneses, Germen C. Japanese, Germans
4．Two ______ would come to the village.
A. woman-doctors B. women doctor C. women doctors D. woman doctors
5．Can you see nine _____ in the picture?
A. sheep B. dog C. pig D. horse
6．The _____ has two ______.
A. boys, watches B. boy, watch C. boy, watches D. boys, watch
7．The boy often brushes his _____ before he goes to bed.
A. tooth B. tooths C. teeth D. teeths
8．The Japanese ____ will not leave China until she finishes her study.
A. woman B. women C. man D. men
9．There are lots of _____ in the basket on the table.
A. tomatos B. tomato C. tomatoes D. tomatoss
10. The cat caught two ______ last night.
A. mouses B. mice C. mouse D. mices
参考答案：KEYS:B C C C A C C A C B