be动词意思和用法很多，一般的意思是：是，有多种变化形式，is，am，are.下面小编告诉你
七年级上册英语be动词用法，大家一起来看看吧!
七年级上册英语be动词用法：
用法
第一人称和第三人称的单数形式，则用was
第一人称和第二人称、第三人称的复数，则用were
时态
如果是一般过去时,就用was/were
如果是一般现在时,就用am/is/are
如果是一般将来时,就用will be
区别
was，were，being，been，to be.另外，be动词还有成为的意思。根据句子中不同的人称、数和时态，应该选择相应的be动词。
there be与情态动词连用：
■there+情态词+be…
There could be no doubt about it. 对此不会有丝毫疑问。
There won’t be an election in June 6月份将不进行选举。
There must be a mistake. 一定是弄错了。
■there+情态词+have been…
There can’t have been any doubt about it. 对此不会有过任何疑问。
There might have been a strike. 可能有过一场罢工。
There oughtn’t to have been any difficulty about it 此事本不应有什么困难。
■there+情态词+be+补足语+现在分词
There can’t be anyone waiting outside. 不会有人在外面等候。
There never used to be anyone living next door 过去隔壁从未住过人。
There could be something blocking the pipe 管子里可能给什么东西堵上了。
■there+情态词+have been+补足语+现在分词
There might have been someone waiting outside. 可能曾有人在外面等候。
There must have been something blocking the pipe 管子肯定曾被什么东西堵住了。
There could have been someone crossing the road. 可能曾有人横穿马路。
there be句式中动词be的变体：
有时可将there be中的动词be 换为 live, remain, seem, appear, exist, stand, lie, come等：
Once upon a time there lived a man known by the name of Joe Beef. 从前有个人名叫乔·比夫。
There seems [appears] something the matter with her. 她好像是出了什么事似的。
There existed different opinions on this problem. 对这个问题曾有不同看法。
There remained just twenty-eight pounds. 只剩28英镑了。
At the top of the hill there stands an old temple. 在小山顶上有一座古庙。
there be…的否定式和疑问式：
■there be句式否定式的用法
there be句式的否定式通常应将否定词置于动词be之后：
There is not any bread left. 没有一点面包了。
There isn’t anything I can do for you. 我帮不了你什么忙。
若谓语中包括有助动词或情态动词，通常将否定词置于助动词与情态动词之后：
There can’t be so many mistakes. 不可能有那么多错误。
There shouldn’t be any doubt about it. 对此不应有什么怀疑。
There haven’t been any parties in weeks. 好几个礼拜没开过晚会了。
另外注意以下类型的否定式：
There doesn’t seem to have been any difficulty over the money question. 在钱的问题上似乎没发生什么困难。
■there be句式疑问式的用法
there be句式的疑问式通常应将否定词置于动词be之后：
Is there any good film on? 映什么好电影吗?
Is there room for me in the car? 车子里还有我坐的地方吗?
Are there any letters for me? 有我的信吗?
若谓语中包括有助动词或情态动词，通常将助动词或情态动词移至句首构成疑问式：
Has there been an accident? 出事了吗?
Have there been any new developments? 有什么新的发展吗?
Can there have been so much rain there?那儿会下过那么多雨吗?
另外注意以下类型的疑问式：
Uncle Jesse, why do there have to be poor people like those? 杰西叔，为什么一定要有他们那样的穷人?
