помогите просклонять 3 предложения на английском по временам :(((

из Present Simple в:
>Present Continious,
>Past Simple,
>Past Continuous,
>Past Rerfect.

предложения:
1) This book is read by millions of children all over the world.
2) I go to the gym twice a week.
3) We don’t know what to tell the teacher.

1 this book is being read ..This book was read ..This book was being read..This book had been read ..2 i am going to the gym nowi went to the gym twice a weekI was going to the gym this time yesterdayI had gone to the gym before you came3 we don't know what we are telling the teacher nowWe didn't know what to tell the teacherWe didn't know what we were telling the teacherWe didn't know what we had told the teacher