Just remember done is done

Just remember done is done remember doing & remember having done done is what is done is done what's done is done What is done is done.是什么结构? I have just done it. what's done is done 是什么意思呀 ? What done is twenty an done is you job is well done()for it?yes,I remember() a did you pay; remember doing 和remember to have done 的区别