Be動詞定義及用法
1. Be動詞有三個，am,is還有are.我用am, 你用are, is跟著他她它，復(fù)數(shù)全部都用are.
如果遇到過去時，was來把am,is替，were來把換掉動詞are
2. do和be動詞的用法區(qū)別
Be 動詞就是(am，are,is)..句子中如果沒有實意動詞(例如:write，buy)之類的動詞，就直接在主語后面加Be動詞。而如果是句子中有實意動詞，那么如果你要改為一般疑問句，就要借助DO(do也稱為助動詞)，例如:I study.
改為一般疑問句:Do you study ?
順口溜：be氏三朵花, am, is還有are,
我(I)戀am, 你(you)戀are,
is跟了他(he)她(she)它(it),
單娶is, 復(fù)娶are。
詳細講解：
英語的be 動詞是個用法比較復(fù)雜的動詞。復(fù)雜的原因有兩點：
1、 除了原形的 be 之外，對于不同人稱代詞以及單數(shù)名詞和復(fù)數(shù)名詞，be 會有各種變化形式和縮寫形式。概括一下有七種形式：be, am, is, are, was, were, been, being。它們與人稱代詞和名詞單、復(fù)數(shù)的搭配關(guān)系是：
現(xiàn)在時 I am, you are, he/she/it/ is, we/you/they are;名詞單數(shù)、不可數(shù)名詞用is，復(fù)數(shù)用are。
縮略式 I'm, you're, he's, we're, you're, they're
否定縮略式 I'm not, isn't, aren't
過去時 I was, you were, he/she/it/ was, we/you/they were;名詞單數(shù)、不可數(shù)名詞用was，復(fù)數(shù)用were。
否定縮略式 wasn't, weren't
過去分詞 been
現(xiàn)在分詞 being
2、在句子中，be有兩種主要作用：一是作為系動詞(The Linking Verb)，本身可以作用謂語動詞;二是做為助動詞(The Auxiliary Verb)，與謂語動詞一起構(gòu)成各種時態(tài)和被動語態(tài)等。
下面做個簡要的講解。
一、be 動詞做系動詞
1、系動詞+表語”的結(jié)構(gòu)
當be 動詞做系動詞使用時，主要構(gòu)成“系動詞+表語”的結(jié)構(gòu)，在句子中做謂語。表語可以是名詞、形容詞、副詞、介詞短語等。例如：
The man is a science teacher.
Mary's new dresses are colourful.
Mother is in the kitchen now.
I have been there before.
They shall be here at 10:00 tommorow.
That can't be true.
You are not being very polite.
Your brother is being very annoying this evening
2、be 動詞的一般疑問句，方法是把be 移到主語前面，也可說成是移到句首。
Is the man a science teacher? Yes, he is. / No, he isn't.
Are Mary's new dresses colourful? Yes, they are. / No, they aren't.
Was mother in the kitchen then? Yes, she was. / No, she wasn't.
Were you at home the day before yesterday? Yes, I was. / No, I wasn't.
Was she late this morning? Yes, she was. / No, she wasn't.
1. Be動詞有三個，am,is還有are.我用am, 你用are, is跟著他她它，復(fù)數(shù)全部都用are.
如果遇到過去時，was來把am,is替，were來把換掉動詞are
2. do和be動詞的用法區(qū)別
Be 動詞就是(am，are,is)..句子中如果沒有實意動詞(例如:write，buy)之類的動詞，就直接在主語后面加Be動詞。而如果是句子中有實意動詞，那么如果你要改為一般疑問句，就要借助DO(do也稱為助動詞)，例如:I study.
改為一般疑問句:Do you study ?
順口溜：be氏三朵花, am, is還有are,
我(I)戀am, 你(you)戀are,
is跟了他(he)她(she)它(it),
單娶is, 復(fù)娶are。
詳細講解：
英語的be 動詞是個用法比較復(fù)雜的動詞。復(fù)雜的原因有兩點：
1、 除了原形的 be 之外，對于不同人稱代詞以及單數(shù)名詞和復(fù)數(shù)名詞，be 會有各種變化形式和縮寫形式。概括一下有七種形式：be, am, is, are, was, were, been, being。它們與人稱代詞和名詞單、復(fù)數(shù)的搭配關(guān)系是：
現(xiàn)在時 I am, you are, he/she/it/ is, we/you/they are;名詞單數(shù)、不可數(shù)名詞用is，復(fù)數(shù)用are。
縮略式 I'm, you're, he's, we're, you're, they're
否定縮略式 I'm not, isn't, aren't
過去時 I was, you were, he/she/it/ was, we/you/they were;名詞單數(shù)、不可數(shù)名詞用was，復(fù)數(shù)用were。
否定縮略式 wasn't, weren't
過去分詞 been
現(xiàn)在分詞 being
2、在句子中，be有兩種主要作用：一是作為系動詞(The Linking Verb)，本身可以作用謂語動詞;二是做為助動詞(The Auxiliary Verb)，與謂語動詞一起構(gòu)成各種時態(tài)和被動語態(tài)等。
下面做個簡要的講解。
一、be 動詞做系動詞
1、系動詞+表語”的結(jié)構(gòu)
當be 動詞做系動詞使用時，主要構(gòu)成“系動詞+表語”的結(jié)構(gòu)，在句子中做謂語。表語可以是名詞、形容詞、副詞、介詞短語等。例如：
The man is a science teacher.
Mary's new dresses are colourful.
Mother is in the kitchen now.
I have been there before.
They shall be here at 10:00 tommorow.
That can't be true.
You are not being very polite.
Your brother is being very annoying this evening
2、be 動詞的一般疑問句，方法是把be 移到主語前面，也可說成是移到句首。
Is the man a science teacher? Yes, he is. / No, he isn't.
Are Mary's new dresses colourful? Yes, they are. / No, they aren't.
Was mother in the kitchen then? Yes, she was. / No, she wasn't.
Were you at home the day before yesterday? Yes, I was. / No, I wasn't.
Was she late this morning? Yes, she was. / No, she wasn't.