英文句子语法修改.It's has been 6 days since i purchased.我想要句子的意思是,“已经过了我买的第6天了.”请修改本句子的语法,我是在想i had purchased 还是i purchased?

英文句子语法修改.It's has been 6 days since i purchased.我想要句子的意思是,“已经过了我买的第6天了.”请修改本句子的语法,我是在想i had purchased 还是i purchased?
英文句子语法修改.
It's has been 6 days since i purchased.
我想要句子的意思是,“已经过了我买的第6天了.”
请修改本句子的语法,我是在想i had purchased 还是i purchased?

英文句子语法修改.It's has been 6 days since i purchased.我想要句子的意思是,“已经过了我买的第6天了.”请修改本句子的语法,我是在想i had purchased 还是i purchased?
It has been 6 days since i purchased
同意楼上,不过it后面的s删了是因为只能有一个谓语

该是It has been 6 days since i purchased it。因为since后面的从句只能是用一般过去时。从句可以是现在完成时。