He has never been abroad before.这里的been是什么

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• 看语法书看到动词的完成时 讲到主语第三人称单数+has+过去分词+.例句是 He has been to the Great Will 我看到这里完全懵了 别人说是Be的过去分词 但是我实在不明白 has been到底是什么意思 刚刚百度 有人说是 去过的意思 但是这个例句不表示去过吧?He has been busy since then.希望英语达人解释下!还有,说be动词的过去式,是类似于 He is 变成He was这样吗?那个be是系动词还是助动词啊?
• He has never been concened about what other people think of him.其中about有什么作用如果去掉about句子要怎么改动才会保持原来的意思
• He has been able to tell us more about active volcanoes than any man alive.这里的alive是不是形容词作后置定语,但是为什么不写成any alive man,意思一样吗?
• It's the first time that he has been to china.的反意疑问句是什么
• 下面这句话的完成时态是什么用法,he has not been well but he's completely better now这句话为什么用 hasn't 而不是wasn't 表达的意思有什么不同 本句绝非病句 一知半解者请保留答案
• 初二第一单元英语适当形式填空用所给词的适当形式填空：well-known headline abord influence pretty landmark nickname region further1.He has never been____in his life.2.the tide waves of Qiantang River is a ___natural wonder.3.London Eye is one of London's most modern___4.The eastern___are developing much faster.5.Most of the world's top___clothes are too expensive for us to buy.6.Do you know the___of the moom on agricultural production?7.His behaviour has earned him the___"Mad Dog
• -Where is Tom?-He hasn't come to school tod-Where is Tom?-He hasn't come to school today.I think he____hopital because he is ill.A.has been to B.has gone toC.was in D.has been in但为什么不能选B呢?B和D两个选项的区别具体是什么?
• .说明下列句子中副词的功能：1.She quietly closed the door.2.His advice was very wise.3.He always calls at the weekend.4.She speaks clearly and correctly.5.This lesson is awfully difficult.6.The post office has already closed.7.I’m terribly sorry to be late.8.Have you ever been in an aeroplane?9.Is she still working there?10.I have never drunk so much beer.
• 新概念英语第二册第4课的一个问题第4课最后一句:My brother has never been abroad before,so he is finding this trip very exciting.为什么后半句的谓语动词用现在进行时“is finding”而不用过去式“found”?
• success is very important to the person who has never been succeed 这个句子语法是否正确?这个句子语法是对的吗?如果错了该怎么改一下呢?1.这里the person改作a person是否可行,句意有区别吗?2.后面的the person who has never been succeed是否可以换作the person who was never succeed.
• 机器厂技术革新后,每天节约钢材6吨,因此原来7天用的钢材,现在可用10天.现在每天用刚才多少吨?为什么是10×6=60,60÷3=20,20-6=14呢?
• 环形跑道周长800米，甲、乙两名运动员同时顺时针自起点出发，甲每分钟跑400米，乙每分钟跑375米，_分钟后，甲、乙能相遇．