be expected to do 对的话麻烦说下此句型的释义、用法

是的,被动语态后面加不定式,表达“被期许（预期）会做XX事... ”
例如：
1）He is expected to arrive at ... 预期他将会在...抵达
2）John is expected to come to the party today. John 应该会出席今晚的宴会
3）He is expected to do well in the test. 他被期许在考试中得到好成绩