it has been +长度时间+ since+主语+谓语+宾语这里的谓语是过去式还是过去分词?

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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?
• it has been +长度时间+ since+主语+谓语+宾语这里的谓语是过去式还是过去分词?
• 英语翻译1 【 他有多久没来这里了?】我这么写的话,How long hasn't he come here 是否可以呢?句型,语法是否正确?how long 记得,在完成时时态 疑问句中,how long是 不能和短暂动词连用的,这里的 come 就是短暂动词这个句子用了 否定,haven't【 现在完成时 的 否定句 句子,谓语动词 如果是短暂动词,则可以 和 一段时间的 状语连用,】这个知识点,清楚我上面写的 疑问句子 能用 how long 提问不?这样的疑问句 算什么疑问句?否定疑问句吗?网上搜到一些 How long haven't / hasn't + 主语 + 谓语,应该是有这样的句型.呵呵咨询了几个朋友,有说 应该把 come 改成 been How long haven't you 【been】here How long haven't you come here How long haven't you been here 两个表达 那个才是对的?还是说 都是可以的呢?How
• it has been +长度时间+ since+主语+谓语+宾语这里的谓语是过去式还是过去分词?
• What money I have has been given to you.希望高手详细分析一下这句话的成分,特别是前半句各词各短语的用法.十分感激啊!谢谢所有回答者，但What到底是个什么用法？它在主语从句中做什么成分？（What引导主语从句时，what是必须充当成分的）或者谁干脆一点，把前半句（主语从句）里的各个成分一一分析下（比如what是主语，还是money,I是主语？谓语是哪个？宾语是哪个？还有其他成分没？其实我最想知道的就是从句里的各个成分，希望好心人来解除我脑中的疑惑，感激不尽！
• 把两个定语从句改为简单句This was a time when the two countries were at war.In 1770 the room was complete the way she wanted.
• 将下列每一组中的两个简单句合并为一个定语从句,用第二个句子作定语. 急!1. Monday is the day. We will come on that day.2. He arrived in Shanghai that day. On the same day I left.3. July is the month. The weather is usually the hottest in that month.4. April Fool’s Day is that special day of the year. On that day you should play a joke on someone. 5. March 10, 1876 was the day. On the day the first complete sentence was sent over a telephone. 6. The city was beautiful. We spent our vacat