to be的用法 当be是原型时
1、to be 成为,将要成为 ,是。
2、to-be即将的,未来的。
3、 系动词,相当于“是”如:The flower is red .
4、表存在,如:China is in Asia .
5、 表判断(是/否),如:Are you there ? Yes , I am .
扩展资料
TO BE,英文词组,翻译为成为、即将的。不规则动词。
To be 是不规则动词,须熟练掌握它的各种形式:
am , is , are , was , were , is being , has been , should be , could be , would be , might be , shall be , will be , can be , must be , need to be ...
参考资料来源:白不白看-to be
2016-05-24 · 百度认证:北京新东方迅程网络科技股份有限公司官方账号
to be其实是不定式的一种形式,to+动词原型构成动词不定式.这是非谓语动词用法的一种。在英语里,“ be + to do ”结构可用来表示将来时间,它的具体用法如下:
表示“按计划、安排(要做某事)”
We are to meet at the school gate. (我们将在校门口碰头。)表示“命令”
You are to be back before five o'clock. (你须在 5 点钟以前回来。)表示“职责”
I am to inform you that the meeting will be held in Wuhan. (我谨通知你会议将在武汉召开。)
表示“目的”
The prize was to honour him for his great discoveries. (这项奖励是为了对他的重大发现而表示的敬意。)表示“用途”
A pen is to write with. (钢笔是用来写字的。)表示“命中注定”
They were never to meet again. (他们注定以后永远不会再见面了。)表示“应该做(某事)”
What are we to do next? (我们下一步应该怎么办?)表示“可能性”
It's eleven o'clock now. He is to get to Mike's house. (现在 11 点了,可能他已经到达迈克的家了。)表示“征求对方的意见”
Am I to go on with the work? (这项工作我是不是接着干下去?)
解析例句:1)i want to be an English teacher.
我打算做一名英语老师。(这里的to be做宾语,意思为将要;打算成为)
2)to be frank,i have no idea where he went.
老实说,我并不知道他去了哪里。(这里的to be frank做状语)
3)to finish the work in time,i ask my friend to help me.
为了及时完成工作,我叫我的朋友帮忙。(这里的to finish the woek in time做目的状语)
总的来讲,动词不定式可以做句子的不同成分。
比如 I want to be a doctor。
我想成为一名医生