1. Nothing can change my mind
My mind can't be changed by anything(Can + V → Can + be + V3/V-ed.)
2. No one had told me about it
I hadn't been told about it(Hiện tại hoàn thành:S + have/has + been + P2)
3. I don't know her telephone number
Her telephone number isn't known(Hiện tại đơn:S + am/is/are + P2)
4. My students will bring the children home
The children will be brought home by my students(Tương lai đơn:S + will + be + P2)
5. They sent me a present last week
I was sent a present last week(Quá khứ đơn:S + was/were + P2)