be是一个多功能动词,在初级英语里可见四种用法:
功能一,系动词be
be为连系动词,中心词义是是,句型为主+系+表结构。be的形式常用am, is, are(现在式);was, were(过去式);will/can/may/must be(助动词/情态动词+原形);have/has/had been(助动词+过去分词)等。如:
To help animals is helping people.(一般现在时)
The twins were very busy yesterday.(一般过去时)
It will be sunny tomorrow.(一般将来时)
She has been ill for over a week.(现在完成时)
功能二,助动词be
助动词be,无词义,辅助主要动词一起在句中作谓语动词。用法如下:
1. be+doing:构成进行时态,有现在和过去两种进行时态。如:
The girls is reading and copying the new words now.
Young Tom was always asking questions and trying out new ideas.
2. be+done:构成被动语态(主语是动作的承受者,done必须是及物动词)。如:
Tea is grown in my hometown.(一般现在时的被动语态)
This building was built three years ago.(一般过去时的被动语态)
Our classroom has been cleaned and tidied already.(现在完成时的被动语态)
How could this kind of cakes be made in your home?(含情态动词的被动语态)
That is a day never to be forgotten.(动词不定式的被动语态)
3. be+going to do,表示打算或将要做某事,be有现在和过去两种形式。如:
We are going to plant trees in the park.
I didn't know if she was going to come here.
4. be+to do,表示按计划安排将要做某事。如:
The new shop is not to be opened till next Monday.
One night an angel came to Mary and told her that she was to have this special boy.
功能三,there be
there be句式为:there be+主语部分+状语部分,表示某处存在某物,be常用现在时,过去时和将来时等。如:
Oh, cool! And there are many things to see. There is even a deer park in Sanya.
There are about 80 pyramids in Egypt.
Will there be a football match in your school next week?
功能四,实义be
可以将be视为实义动词,因为它具有实际的词义,如成为;做;发生;举行;逗留;到达等。如:
His daughter wants to be a doctor for animals in her twenties.
Kate's birthday party will be at half past six this evening.
Jim has been in China for more than two years, but he has not yet been to Yichang.
上一篇: 初三年级英语语法练习卷
下一篇: 初三版:Keep 用法解读
2014高考英语一轮总复习 课时作业22 Unit2 The United Kingdom 新人教版必修5
2014高考英语一轮总复习 课时作业39 Unit4 Pygmalion 新人教版选修8
2014高考英语一轮总复习 课时作业29 Unit4 Global warming 新人教版选修6
2014高考英语一轮总复习 课时作业12 Unit2 Healthy eating 新人教版必修3
2014高考英语一轮总复习 课时作业27 Unit2 Poems 新人教版选修6
2014高考英语一轮总复习 课时作业32 Unit2 Robots 新人教版选修7
2014高考英语一轮总复习 课时作业36 Unit1 A land of diversity 新人教版选修8
2014高考英语一轮总复习 课时作业16 Unit1 Women of achievement 新人教版必修3
江苏省2014届高三英语一轮复习 写作攻略训练(7)
2014高考英语一轮总复习 写作训练4 新人教版
2014高考英语一轮总复习 课时作业17 Unit2 Working the land 新人教版必修4
2014高考英语一轮总复习 课时作业33 Unit3 Under the sea 新人教版选修7
2014高考英语一轮总复习 写作训练8 新人教版
2014高考英语一轮总复习 课时作业30 Unit5 The power of nature 新人教版选修6
2014高考英语一轮总复习 课时作业15 Unit5 Canada“The True North” 新人教版必修3
2014高考英语一轮总复习 课时作业34 Unit4 Sharing 新人教版选修7
2014高考英语一轮总复习 课时作业31 Unit1 Living well 新人教版选修7
2014高考英语一轮总复习 写作训练6 新人教版
江苏省2014届高三英语一轮复习 写作攻略训练(3)
2014高考英语一轮总复习 课时作业19 Unit4 Body language 新人教版必修4
2014高考英语一轮总复习 课时作业18 Unit3 A taste of English humour 新人教版必修4
2014高考英语一轮总复习 写作训练3 新人教版
江苏省2014届高三英语一轮复习 写作攻略训练(1)
2014高考英语一轮总复习 课时作业40 Unit5 Meeting your ancestors 新人教版选修8
2014高考英语一轮总复习 课时作业26 Unit1 Art 新人教版选修6
2014高考英语一轮总复习 课时作业28 Unit3 A healthy life 新人教版选修6
2014高考英语一轮总复习 课时作业29 Unit4 Global warming 新人教版选修6
2014高考英语一轮总复习 课时作业23 Unit3 Life in the future 新人教版必修5
2014高考英语一轮总复习 课时作业38 Unit3 Inventors and inventions 新人教版选修8
2014高考英语一轮总复习 课时作业24 Unit4 Making the news 新人教版必修5