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?
写人工智能的英语作文
如今人工智能影响着我们生活的方方面面,在英语中也有关于人工智能的作文题材,那你想知道写人工智能的英语作文怎么写吗?下面是小编收集整理的一些写人工智能的英语作文,大家一起来看看吧! 写人工智能的英语作文篇一:
英语学习
2020-10-22