keep your fingers crossed为什么要加ed?

keep your fingers crossed为什么要加ed? keep your fingers crossed什么意思 什么意思：keep your fingers crossed Keep your fingers crossed.为成功祈祷吧. I'll keep my fingers crossed. Keep my fingers crossed for you~ keep one's fingers crossed什么意思 good luck with your driving test:I keep my fingers crossed f keep your fingers crossed until he ends the call 我在阅读中看到这句话不 Good luck!We'll keep our fingers crossed for you. You may have your fingers crossed that thisbelief is nonsens can't keep your fingers off it!