请问be done的被动语态什么时候be需要变位?

Question

That memo(write)______ by Sadashumi yesterday
It is important that this product (promote)_______ heavily
第一句是was written, 第二句为什么不是is promoted而是be promoted?

Answer 1

It is important(wrong,necessary,right ,good and so on)that+主语+should +动词原形（should可省略）是动词虚拟语气的特殊形式。 所以第二句应是：
It is important that this product(should) be promoted heavily.