状态/存在 动作 时态
- be动词的现在式 - am,are,is
be动词的含义
是（例）We are happy.
在（例）She is in America.
主词 + be动词（am\are\is使用场景）
第一人称（I） + am => I am a boy.
第二人称（you）/复数名词(they) + are
You are my sons.你们是我的儿子。
第三人称单数/单数名词 + is（he\she\it）
He is my student.
be动词的否定=>am/are/is + not
肯定句：主词+am/are/is ...
否定句：主词+am/are/is + not ...
（例）He is(He's) a good baseball player.
否定句=>He is not a good baseball player.
+>He isn't a ggod baseball player.
be动词的疑问句 =>将be动词放主词前，句尾加问号。
肯定句：主词 + am/are/is
疑问句：Am/Are/Is + 主词...?
（例）That is his camera?
The girl is a junior high school student.
疑问句=>Is the girl a junior school student?
be动词开头的疑问句，可用Yes或者No回答
问句：Am/Are?is + 主词...?
答句：Yes,主词+am/are/is. No,主词+am/are/is.
（例）Is that man your math teacher?
答:Yes,he is ./No,he is not.
Are you eating your lunch?你在吃午餐吗？
答句：Yes,I am./No, Iam not.
- 一般动词的现在式
主词 + 一般动词 =>现在式中，主词为第三人称单数，（他她它）一般动词 + s或es
第一人称： I like dogs./We like dogs.
第二人称： You like dogs./ You like dogs.
第三人称：He likes dogs./They ike dogs.
一般动词+s或es的方法
语法的规则，记下下来就行，来由是和历史演变有关的
a. 大部分动词 + s，其发音为[s]
（例）works plays
b. 一般动词字尾为a\s\sh\ch时，加es
例 goes/z/ washes/ɪz/ watches/ɪz/
c. 一般动词字尾为字音+y时，须去掉y加ies
例 cry ->cries study->studies
have和has=>have（有，吃）的单数动词为has
例 They have a lot of money.不可数n.
He has a lot of money.
一般主词的否定句=>不可在一般动词后加not，须用助动词do/does
do =>用于主词为 I you 复数/does=>用于主词为第三人称单数
肯定句：主词+一般主词...
否定句：主词+do/does+not + 原形动词
例 1.1 The twin brothers go to school by bus.
否定句： The twin brothers do not(don't) go to school by bus.
1.2 Sam has dinner at the restaurant.
否定句：Sam does not（doesn't） have dinner at the restaurant.
比较：否定句
be 动词 => He is my boyfriend.
He isn't my boyfriend.
一般动词 => He likes dogs.
He doesn't like dogs.
一般动词的疑问句=>不可将一般动词放主词前面，须用助动词do/does
疑问句：Do/Does + 主词 + 原型动词...?
例：1.1 You visit your grandmother on Sundays.每逢星期天都会去探望外婆。
问句：Do you visit your grandmother on Sundays?
1.2 He comes from England.
问句：Does he come from England?
助动词do或does开头的问句Yes/No 之后用do/does回答
例 Does the little boy go to shcool?
答句： Yes,he does./No, he doesn't.
比较：疑问句
be动词 => She is beautiful.
Is she beautiful?
一般动词=>She loves ternnis.
Does she love ternnis?
Yes,she does./No,she doesn't.
学习笔记：谢孟媛英语初级文法完美版视频课程
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