Надо предложение : I read a book
склонить
Simple :

1.I read a book ( pr simp)
2.I am reading a book now ( pr cont )
3.I have read a book recently (pr perf)
4.I have been reading a book ( pr perf cont )
5. I read a book yesterday ( p simp )
6. I was reading a book (p cont )
7. I had read a book (p perf)
8. I had been reading a book ( p perf cont )
9. I will read a book tomorrow ( f simp)
10. I will be reading a book ( f cont )
11. I will have read a book ( f perf )
12. I will have been reading a book ( f perf cont )