We have been living here since 1959 这里的have为什么不用过去时had 为什么li

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We have been living here since 1959 这里的have为什么不用过去时had 为什么live变成ing的形式

这是现在完成时,表达一直持续到现在的动作,所以用现在完成时have
一个句子只能出现一个动词,have已经是动词了,所以用动名词living,表达状态

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再问：是不是如果出现两个动词在句子中第二个动词就加ing
再答：只能说一个句子只能出现一个动词要是句子包括从句动词就会多

We have been living here since 1959 这里的have为什么不用过去时had 为什么li The Smiths (have been living) here for ten years 为什么不能用 have He has lived here since 1992.这里为什么用has lived而不用has been livi We have been studying english since we move here i have know him since i have been here.为什么不成立 We （have been） good friends since we met at school.为什么用have I have been busy since yesterday.现在完成时是have加过去分词,但这里的过去分词在哪里 1 We have been here since ten years ago.-------------------- "i have been for a long time"中,"have" 为什么不用"had"? I have been here since 1976 这里的have 是实意动词吗?那么在现在完成时中是不是没有助动词 we have had been having a lot of rain recently 用的是什么时态为什么这么解释一下该句子的时态Since he came here last year, we have been happy.解