be动词意思和用法很多,一般的意思是:是,此种用法,有多种变化形式,is,am,are,was,were,being,been,to be.下面小编告诉你
英语be动词及用法，大家一起来看看吧!
英语be动词及用法：
首先看时态:
如果是一般过去时,用was/were
如果是一般现在时,用am/is/are
如果是一般将来时,用will be
其次看主语的人称及复数形式:
一般过去时:
第一人称和第三人称的单数形式,用was
第一人称和第二人称、第三人称的复数,用were
一般现在时:
第一人称单数形式,用am
第三人称单数形式,用is
第一人称复数、第二人称、第三人称的复数形式,则用are
一般将来时:
will be
口诀:一般时态有关be动词的口诀
我用am,你用are,is连着他/她/它,单数is
复数are 他们they 也用are 你们you 也用are
there to be…的用法：
there to be 为 there be 的非谓语形式之一，它在句中主要用作状语或介词for的宾语。
■用作动词宾语
该结构可用作某些动词(如like, prefer, hate, want, mean, intend, expect, consider 等)的宾语：
I don’t want there to be any misunderstanding. 我可不希望有任何误解。
Students hate there to be too much homework. 学生讨厌做太多的家庭作业。
We expect there to be more discussion about this. 我们期望能对此展开更多的讨论。
【注】在let there be句式中，动词be不带to：
Don’t let there be any noise. 不允许有任何吵闹。
Let there be no mistake about it. 这事不要出错。
■用作介词for的宾语
They asked for there to be another meeting. 他们要求再开一次会议。
【注】用作介词宾语一般用there being，但用作介词for的宾语时，只能用there to be。比较：
They planned on there being another meeting. 他们打算再开一次会议。
They planned there to be another meeting. 他们打算再开一次会议。
there being…的用法：
there being为there be的非谓语形式之一，它在句中主要用作状语或作介词宾语。
■用作状语
There being nothing else to do, we went home. 由于没什么其他的事要干，所以我们就回家了。
There having been no rain, the ground was dry. 由于没有下雨，所以地面很干。
【注】有时可与状语从句转换：
There being no further business , I declared the meeting closed. 由于没有别的事了，我宣布闭会。
As there was no further business, I declared the meeting closed. 由于没有别的事了，我宣布闭会。
■用作介词宾语
There is now some hope of there being a settlement of the dispute. 现在有点希望可以解决这次争端。
there be结构的be的活用：
■there be 结构中的be必须随着be后面名词的数及句子后面的时间，使用不同的形式或时态。如：
(1) There are fifty chairs, desks and a blackboard in our classroom. 我们的教室里有五十把椅子、五十张课桌和一块黑板。
(比较) There is a blackboard, fifty chairs and desks in our classroom. 我们教室里有一块黑板、五十把椅子和五十张课桌。
(2) There weren’t any high buildings in the village twenty years ago. 二十年前，村子里没有高楼大厦。
■there be结构可与情态动词can, could, will, would, must, may, might, ought to 及某些不及物动词seem, appear, happen等连用，如：
(1) Do go into the hole, for there can be snakes in it. 不要进到洞里面去，因为洞里可能有蛇。
(2) The car doesn’t run. There must be something wrong with it. 车不走了，肯定出了毛病。
(3) There seemed to be some people in the room, for the water is still hot. 房间里原来似乎有人，因为水还是热的。
(4) There happened to be a policeman there. 碰巧那儿有个警察。
■有时为了使句子表达生动，动词be 可换成 come, live, remain, stand, lie, appear, exist, seem, remain, …. 。如：
(1) Long ago, there lived a king who loved horses very much. 很久以前，有个非常喜欢马的国王。
(2) There stands a house on the top of the mountain. 山顶上有座房子。
(3) There exists some doubt in what he said. 在他所的话中有些疑点。
■there be 结构不能跟 have(有) 连用，但可跟 have / has + 过去分词，或 have /has to + be / stand / lie 等动词原形等连用。如：
(1) The man liked to plant trees, and soon there have been tall trees around his house. 那个人喜欢种树，不久他房子的周围就有了很多大树。
(2) There has to be air and water on the planet for living things to live on. 在那颗行星上必须要有能使生物生存的空气和水。
