how are you 和how has your week been so far区别以及回答的完整的句子

how are you?只是见面时最帝通的问候方式,回答只需 I am fine, thank you, and you?
How has your week been so far?问这周到目前为止过得怎么样?回答可以用,I have been too busy., 或 this week has been tough.
再问： how has your weekend been so far?怎么理解？又怎么回答？ 两个句子为什么不用HAVE而用的是HAS呢？ how are you 是不是和HOW IS GOING?和相似？又怎么回答他的提问比较合适？ 谢谢
再答： how has your weekend been so far?这里问的主语是weekend,是相当于单数形式,所以得用has, 再比如这句how have you been?你最近过得怎么样,这里的主语是you,所以得用have. How are you?这是英语中最常见的见面问候方式,类似的还有,how are you doing, How'd it go?How was your day? what's up?回答都可以用I am fine. pretty good,等