英语语法，八大时态

Question

能不能 帮我解释一下， 顺便帮我做下老师给 的任务， 把I buy a book. 改成八大时态。然后一一改为对应的被动 有点麻烦了，先谢谢

Answer 1

1. I buy a book. A book is bought by me. 2. I am buying a book. A book is being bought by me. 3. I bought a book. A book was bought by me. 4 I was buying a book. A book was being bought by me. 5. I have bought a book. A book has been bought by me. 6. I had bought a book A book had beeb bought by me. 7 I will buy a book. A book will be bought by me. 8 I would buy a book. A book would be bought by me. 参考下吧