Answer:
yessssss... what's ur question??
That is the best book that I ( have read )on that subject.
reason = because that event has already happend in past but its impact is still on present so it is past perfect..........
To convince the reader that what they are writing about is true and correct, and to add a deeper meaning and depth to their writing.
The essay tells a story about race relations in harlem. (Apex)
"How to plant" is the indirect object because it's referring to the main idea without affecting the action.