作為系動(dòng)詞(也叫連系動(dòng)詞，link verb)的be，是英語學(xué)習(xí)者接觸最早的用法。下面是小編給大家分享的系動(dòng)詞學(xué)習(xí)內(nèi)容，大家可以作為學(xué)習(xí)的參考。

英語系動(dòng)詞be用法：

(一)be的時(shí)態(tài)變化

系動(dòng)詞be會有一般現(xiàn)在時(shí)、一般過去時(shí)、一般將來時(shí)、現(xiàn)在完成時(shí)、過去完成時(shí)等的時(shí)態(tài)變化。如：

He isa student.

They werein the park yesterday.

It will be cloudy tomorrow.

He has been ill for six days.

It had been three hours before she left the hat shop.

(二)be與情態(tài)動(dòng)詞的連用

其用法為：情態(tài)動(dòng)詞+系動(dòng)詞be原形。如：

It must be Lucy's book. Her name is on the cover.

It can be very difficult for us to memorize too many words within such a short time.

She should be here on time tomorrow.

系動(dòng)詞可接哪些詞語作表語：

連系動(dòng)詞后的表語通常是名詞和形容詞，有時(shí)也可以是代詞、數(shù)詞、副詞、介詞短語、不定式、動(dòng)名詞、從句等。如：

1. 用名詞作表語。如：

Translation is an art. 翻譯是一種藝術(shù)。

Beijing is a beautiful city. 北京是一座美麗的城市。

2. 用形容詞表作語。如：

Traveling is interesting but tiring. 旅行是有趣的，但是使人疲勞。

Every hour and every minute is important. 每一小時(shí)，每一分鐘，都很寶貴。

3. 用代詞作表語。如：

My idea is this. 我的想法是這樣的。

Money isn’t everything. 金錢不是一切。

His latest play is nothing. 他最近出的那個(gè)劇本毫無價(jià)值。

4. 用數(shù)詞作表語。如：

Tom is 14. 湯姆14歲。

Last check-in time is 20:15. 最后檢票時(shí)間為20點(diǎn)15分。

The average of letters received each month is 3,000. 每月平均收到信件3,000封。

5. 用副詞作表語。如：

The secret is out. 機(jī)密泄漏了。

Sales are down. 銷售量下降了。

She is off on Saturday. 她星期六不工作。

6. 用介詞短語作表語。如：

Dinner is at six. 6點(diǎn)鐘開飯。

I hope he is on time. 我希望他準(zhǔn)時(shí)。

Martha still is in hospital. 馬撒還在醫(yī)院里。

Diana was with the children. 戴安娜和孩子們在一起。

You look like your sister. 你模樣像你姐姐。

7. 用不定式作表語。如：

His goal is to be a doctor. 他的目標(biāo)是當(dāng)醫(yī)生。

My duty is to protect my sisters. 我的職責(zé)是保護(hù)我的妹妹們。

My advice to you is to speak the truth. 我對你的忠告是講真話。

My dream is to travel around the world. 我的夢想是環(huán)游世界。

8. 用動(dòng)名詞作表語。如：

Her hobby is growing roses. 她的愛好是種植玫瑰。

His job is looking after sheep. 他的任務(wù)是看羊。

My favorite sport is swimming. 我最喜歡的運(yùn)動(dòng)是游泳。

9. 用從句作表語。如：

That’s what we are here for. 我們來這里就為了這個(gè)。

The question is how he did it. 問題是他是如何做此事的。

That’s where I first met her. 那就是我第一次遇見她的地方。

The trouble is that I have lost his address. 麻煩的是我把他的地址丟了。

副詞可用于系動(dòng)詞后作表語嗎：

原則上說，用于系動(dòng)詞后作表語要用形容詞，而不是副詞。如：

他的英語很好。

誤：His English is very well.

正：His English is very good.

這飯菜聞起來真香。

誤：The dinner smells deliciously.

正：The dinner smells delicious.

但在以下情況，副詞可用作表語(且主要是用于系動(dòng)詞be后作表語)：

1. 表示地點(diǎn)或位置的少數(shù)副詞，如here, there, upstairs, downstairs, abroad, back等。如：

He asked if anyone was there. 他問那兒是否有人。

Are the children back yet? 孩子們回來了嗎?

Neither of them is here. 他們倆都不在這里。

She was abroad all last summer. 她去年整個(gè)夏天都在國外。

If he was downstairs, why didn’t he answer the bell? 他要是在樓下，為何不開門呢?

2. 與介詞同形的小品詞有也可用作表語，如in, on, off, out, by, away, behind, up, down, over, through, around, round, below, inside, outside 等。如：

Make sure the lid is on. 確信要把蓋子蓋上。

The engagement is off. 婚約取消了。

The taxi is outside. 出租車在外面。

The grocery was below. 雜貨店在下面。

The level of unemployment is down. 失業(yè)率在下降。

I phoned Sally but she was out. 我給薩莉打電話，可是她不在。

He hid the money when nobody was by. 附近沒人時(shí)他把錢藏了起來。

By the time we arrived the meeting was over. 我們到達(dá)時(shí)，會議已結(jié)束了。

He was left in charge of the shop while the manager was away. 經(jīng)理不在時(shí)，他負(fù)責(zé)這個(gè)商店。

用于進(jìn)行時(shí)態(tài)三類系動(dòng)詞：

英語的系動(dòng)詞通常不用于進(jìn)行時(shí)態(tài)，但以下幾類有時(shí)可以這樣用：

1. 狀態(tài)系動(dòng)詞

表示狀態(tài)的系動(dòng)詞 be 與動(dòng)態(tài)形容詞連用時(shí)，可以用于進(jìn)行時(shí)態(tài)，表示特定的表現(xiàn)。如：

She is being very annoying this evening. 她今晚很煩人。

Your brother was being a fool yesterday. 你兄弟昨天真蠢。

I was being very careful. 我當(dāng)時(shí)非常小心。

2. 感官系動(dòng)詞

感官系動(dòng)詞feel(感覺), look(看起來)有時(shí)可用于進(jìn)行時(shí)態(tài)。如：

I’m feeling fine. 我現(xiàn)在感覺良好。

I’m feeling a bit lonesome. 我感到有點(diǎn)寂寞。

I’m glad you’re feeling so much better. 我很高興你感覺好多了。

Why is she looking so sad? 她為什么愁容滿面?

My boy is not looking very well. 我的孩子氣色不太好。

但是，當(dāng)feel表示人自身的感覺時(shí)，可用于進(jìn)行時(shí)態(tài);但當(dāng)它表示事物給人的感覺時(shí)，它不能用于進(jìn)行時(shí)態(tài)，如以下各句不用進(jìn)行時(shí)態(tài)：

Silk feels soft and smooth. 綢子摸起來柔軟光滑。

Silk feels soft and smooth. 綢緞摸起來柔軟光滑。

It felt pleasant going to work. 上班去的感覺很愉快。

3. 變化系動(dòng)詞

變化系動(dòng)詞become, grow, get, go, run 等有時(shí)可用于進(jìn)行時(shí)態(tài)強(qiáng)調(diào)變化的進(jìn)程。如：

The weather is getting colder. 天氣漸冷。

Her hair is going grey. 她的頭發(fā)日見花白。

Our supplies are running low. 我們的供應(yīng)品不多了。

The pollution problem is growing serious. 污染問題日見嚴(yán)峻。

It was becoming cold, so we lit the fire. 天氣變冷了，于是我們就點(diǎn)起了火。

以上就是小編給大家分享的英語語法知識點(diǎn)，希望可以給大家在學(xué)習(xí)的過程中帶來幫助。