i have lived here even since i was childhood意思是 我从小就住在这里 为什么不直接写 i have lived here since i was childhood （lived为什么要过去式）
问题描述：
i have lived here even since i was childhood意思是 我从小就住在这里 为什么不直接写 i have lived here since i was childhood （lived为什么要过去式） 还有就是为什么要+was lived为什么要过去式 不直接写i childhood
答
可以写作 i have lived here since i was childhood
lived 不是过去式,而是过去分词.live的过去式和过去分词的变化都是加d.
i childhood 这是不对的.本身i是代词做主语,childhood是名词,这两个词放在一起不能成为一个完整的句子,需要加个be动词,这里用过去式.