it is possible that she is late?这个句子是倒装句呢,还是属于宾语从句?

it is possible that she is late?这个句子是倒装句呢,还是属于宾语从句?
It is important for us to learn English.那这句话呢？是属于什么类型的句型?这个 to 能不能去掉。