定義：經(jīng)常反復(fù)發(fā)生的動(dòng)作或存在的狀態(tài)

be動(dòng)詞用am/is/are

實(shí)意動(dòng)詞用原形或單三形式

句型變化

(1)一般疑問句：將am/is/are提前，I變you,my變your,I am變Are

you,句號(hào)變問號(hào)。

(2)否定句;在am/is/are后加not

She is a student.

Is she a student?

She isn't a student.

當(dāng)主語不是單三時(shí)，謂語動(dòng)詞用原型

句型變化

(1)一般疑問句：在句首加助動(dòng)詞do,I變you,my變your,句號(hào)變問號(hào)。

(2)否定句;在主語和謂語之間加助動(dòng)詞don't

I like blue.

Do you like blue?

I don't like blue.

當(dāng)主語是單三時(shí)，謂語動(dòng)詞用單三形式

句型變化

(1)一般疑問句;在句首加助動(dòng)詞does,my變your,動(dòng)詞還原,句號(hào)變問號(hào)

(2)否定句;在主語和謂語動(dòng)詞之間加助動(dòng)詞doesn't,動(dòng)詞還原

She likes blue.

Does she like blue?

She doesn't like blue.

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