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1.1Be 动词的三种形式(am, is, are) （一般现在时态中）
I am in guangzhou now.
My father (He) in Shanghai.
My sister (She) is in Wuhan.
Guangzhou (it) a city.
We (Lucy and I ) students.
You are a teacher.
They(Guangzhou and Wuhan) cities.
练习：用am, is, are 填空。
1．The U.S._______ a big country.
2．Guangzhou _______ one of the largest province in China. 3．Guangzhou and Shanghai _______ morden cities.
4．We _______ in Guangzhou now.
5．I _______ a student in XX school.
6．Lucy and I _______ teenagers.
7．David _______ my classmate.
8．You _______ my best friend.
9．My dog _______ my best friend.
10．My mother and sister _______ at home.
1.2Be 动词位置。
主语 Be 补语
I am from China.
China is a country.
China is big.
Chinese is my native language.
You are from Guangzhou.
It is hot in Wuhan.
1主语放在句首。作主语的为：人或物。从主语看出我们在谈论的是谁或什么。
2 Be动词am, is, are 放在主语的后面。
3最后面的都是补语。以补语结束句子。补语表明主语的：属于哪类；地点；对主语描述等。
练习：用下面的单词，组成正确的句子。并说明是BE动词的哪种用法。
例子：big/ the U.S.A./ is The U.S.A. is big. （对主语分类）
1.is/ beautiful/ China __________________
2.is/ Texas/ a big state __________________
3.hot today/ it/ is __________________
4.the teacher/ from/ is/ New York. __________________
5.years/ my brother/ is/ 25/ old. __________________
6.a big country/ America/ is __________________
7.in the classroom/ are/ the students __________________
8.the map/ on page 3/ is __________________
9.my parents/ in China/ are __________________
10.am/ I/ a student __________________
1.3主语与人称代词。
Beijing is big. My friend and I are in Guangzhou.
It is in the North. We are in Guangzhou.
My sisiter is a student. My cousins are in Shanghai.
She is very happy. They are in Shanghai.
My father is at work. China and Korea are countries.
He is busy. They are in Asia.
You are my teacher.
Mr Gao and you are my teachers.
You are my teachers.
1主语可以是人称代词。来代替人的名字，或者物。人称代词7个：I; we; you; he, she, it, they. 三人称单数是指:he, she, it.或者一个的人，物：my father, a dog.
2名词单数指只有一个人或物。名词复数指两个或者两个以上的人或物，复数名词以S结尾。（a dog; two dogs）主语是单数时 Be 动词用is, 主语是复数时，用are. I 后面用am. I am a student. Dogs are animals. My mother and father are teachers. 注意The United States (the U.S.) 虽然以S 结尾，但表示单数。The United States is a big country.
总结：I am, we are, you are, he is, she is, it is, t hey are.
3You有两种意思：你，你们。BE动词都用are.到底是哪种意思，要看后面的名词。 You are a student.(你) You are students.（你们）
4当主语是另外一个人和I时。Be动词用are.并把另外一个人的名字放I之前，表示对别人的尊重。John and I are good friends.
5主语用人称代词it来谈论时间和天气。BE动词用is. It is hot in Guangzhou.
It is 6 o’clo ck now.
6They 用来代替复数的人，复数的物。My friends are here. They are good to me. My books are here. They are on the floor.
练习：用正确的人称代词和Be动词填空。人称代词有：____,____,____,____,____,____,____.
例：Canada and Mexico are countries. They are in the North America.
1.Florida is a state. _______ _______ in the Southeast.
2._______ _______ warm in Yunnan.
3.Shanghai and Beijing are big cities. _______ _______ beautiful.
4._______ _______ a student.（指自己）
5._______ _______ 4:30.（时间）
6.My parents are in Guangdong. _______ _______ in Guangzhou.
7.You and I are students. _______ _______ in the classroom now.
8._______ _______ raining today.（天气）
1.6 Be动词用法一。用语描述主语。
主语be very 形容词
New York City is very big.
People are helpful.
The weather is nice.
I am tired.
BE动词+接形容词用来描述主语。形容词没有单复数形式。New York is big. New
