except for 与 except to 有什么区别？

1、 All passengers on board are excepted to fasten the seatbelts when the plane takes off and lands. 2、We are excepted to arrive at the village before dark. except +介词短语一般to在句中要省略,但是当except 是被动与态时，to　不能省略 你看到的这两个句子中的except　正好都是被动语态，所以它后边的　to　就不能省略了