1.to know sth off pat
(know by heart)将某事记在心里
We know every movement we do off pat.我们记着我们做的每一个动作。
2.to have sth down pat or to have sth off pat
(prepared, learned)将某事准备得很充分；对某事了解得一清二楚
I have my story down pat.我把我的故事准备得很充分。
She had the name off pat.这个名字她已烂熟于胸。
He had his answer off pat.他把他的答案准备得很充分。
3.to have sth down pat<美>(mastered)掌握某事；彻底了解某事
By this time she had contrition down pat.到这时, 她彻底了解了什么是悔悟。
a guitarist who has a variety of styles down pat一个掌握了各种演奏风格的吉他手
She seems to have the formula down pat.她似乎完全掌握了这个公式。