When you have finished the report,I will have waited for about 3 hours.

When you have finished the report,I will have waited for about 3 hours.
（当你完成这份报告的时候,我已经在这里等了三个小时了,这里时间状语能不能改成：when you finished the report:）也就是说这个时间状语从句的时态由完成时态改成一般过去时时态行吗?如果翻译的话也能通顺啊,
不对，我说错了，前面的时间状语从句能不能改成：when you finish your report ,i will have waited for about 3hours.就是说吧时间状语从句改成一般现在时，也能翻译通顺啊，