"现在分词的doing形式就是(无所谓主被动)可以表示与动作同时发生，也可以表示与谓语动词首尾相接的动作"，这里的第二种情况是不是当做原因和结果状语时的情况(其实是having (been)
done的省略)？那如下例句对不对：1.Being praised a
second time, I decided to make greater progress.
这里的 being praised其实是having been praised 的省略？
2.Our modern civilization must not be thought as having been created in
a short period of time.
这里的having been created原则上也能换成being created，只不过选择题优先选完整的having been
created？
3.All flights having been cancelled/being cancelled because of the
snowstorm, we decided to take the train.
这里两者都行？
