know backwards การใช้

"I think people realize that Al Gore knows backwards and forwards the numbers on this tax bill, " she said.
After almost 30 years of rice farming, there's not much about the crop that L . G . doesn't know backward and forward.
The first song on " The Unforgettable Fire ", " A Sort of Homecoming ", I know backward and forward it's so rousing, brilliant, and beautiful.
This may be to a certain extent too rigid a description, but the fact remains that, as Cotogni said, his master considered him fit for the stage when there was not a single opera in the current repertoire which he did not know backwards, and when, as he reproachfully added every time I tried to find an excuse for missing a top note, he could be awakened at 3 a . m . and made to give an A-flat mezza voce.