Either my stepfather doesn’t want to be found or someone doesn’t want him to be found.
He was killed on duty last night.
Maybe Walter wasn’t abducted. 也许沃尔特没被绑架.
But my friend, she thinks he was murdered.
1. 感官、使役动词后接不带to 的动词不定式作宾补，在变为被动语态时要加上to (let除外)
They made him work twenty hours a day.
He was made to work twenty hours a day.
He told me when the project would start,
I was told when the project would start by him. （∨）
when the project would start was told to me by him. (×)
3. 动词不定式的被动语态，通常暗示动词不定式的动作不是主语执行的 I have a lot of work to do today. （工作是我自己做，不用被动语态） I have some clothes to be washed. （衣服不是我自己洗，用被动语态）
Trees are planted in our city every year.
Trees are planted in our city.
The plan is being carried out.
Many kinds of art have been lost in the world.
被动语态常用greatly等词修饰，系表结构常用 very, quite, rather, too, so, 等词修饰
I was greatly inspired by the report by Yang Liwei.
I am very interested in computer studies.