英语：这里为什么要用have been

来源：学生作业帮编辑：大师作文网作业帮分类：英语作业时间：2024/11/18 18:15:14

英语：这里为什么要用have been
for men accustomed to sleeping between fine linen sheets at home,the change to the Alps must have been very hard 对于喜欢了睡亚麻床单的人来说来到阿尔俾斯山区生活一定很艰难

must have done 表示对过去的一种肯定推测

英语：这里为什么要用have been 英语：这里为什么要用have been 呢 i have not been to shanghai.这句英语为什么要用 been It's+been++a+long+time.been在这里起什么作用?为什么要用been 英语：He has already been warned of them.这里为什么要在warned前面加上been. I have been sick since yesterday.中have been 是什么是时态为什么要用been. have you been to an aquarium?这里为什么要加an? Have you ever been to ____ West Park?这里要the吗?为什么? would have been为什么不能用在这里? Where have you been there days?这里不是应用have been 为什么there前不加to 现在完成时这里为什么要加been,什么情况下要加been? I have music 这里为什么要用 have