have第三人稱單數(shù)怎么寫

has是have的第三人稱單數(shù)形式。have作動詞有“持有；占有；由……組成；顯示出，帶有(性質(zhì)、特征)”的意思，作助動詞與過去分詞連用構(gòu)成完成時。另外have的現(xiàn)在分詞是having，過去式是had，過去分詞是had。

have的基本用法

一、have作實(shí)意動詞

1.表示“有”的意思。

I have an English book.

He has two ping-pong bats.

2.have和一些其他名詞連用，表示：

(1)一種活動。

They’re going to have a volleyball match.(舉行比賽)

Are we going to have a meeting this week?(開會)

We are going to have a talk this afternoon.(談話)

(2)患病。

I have got a headache.

I have a bad cold.

(3)發(fā)生的情況。

I’ve had so many falls that I’m black and blue all over.

(4)生育。

The queen ant may have tens of thousands of babies in one summer.

3.和一個與動詞同形的名詞連用，表示一個動作(have+a+與動詞同形的名詞)。

Are you going to have a swim.

I have a long talk with the teacher.

4.have on sth.或have sth.on表示“穿著”、“戴著”(=to be wearing)。

I noticed he had on bedroom slippers.

At the ball，Mary had a diamond necklace on.

5.表示“吃”、“喝”。

I wanted to have a cup of tea and some eggs.

Does she have lunch at home?

二、have與to一起構(gòu)成情態(tài)動詞，表示“不得不”、“必須”。

I have to be back by ten o’clock.

I have to look after her at home.

Do you have to look after her at home?

三、have作助動詞與動詞的過去分詞一起構(gòu)成現(xiàn)在完成時和過去完成時。

Great changes have taken place the last two years.

Have great changes taken place the last two years?