What's more在什么情况下要变时态?

不变的
what' more 表示递进,然而/还有...的意思,独立使用,more后面不加词和句
既可以放句首,也可以放句中,放句首当然w要大写W
what's more后面加逗号.
建议信：Dear Sally:
I'm sorry to hear that you're not feeling well.I think you should take it easy ,and you need to take some time off to relax .You should eat more beef and lamb .That can give you more beef and lamb .That can give you more energy .Also ,you should eat more vegetables and fruit to stay healthy.You shouldn't always stay up too late at night .You should go to bad earlier and get up earlier in the morning.You should learn how to care about yourself .I hope you'll be better soon.
放句首时,What's more,……（然而怎样怎样）
放句中,……,what's more,……（……,还有/然而,……）
In addition / moreover / furthermore / what's more.用法一样

应该用 I had stopped··· what's more 后面成份的时态是由其后所跟句子成分决定的，与what's more无关。

不变的！它= in addition.指而且的意思！