pick的过去式形式是picked。picked的意思是选择，挑选，采，摘，（用手指）摘掉，剔除，掐去。picked的例句：A police dog picked up the murderer's scent（一只警犬嗅出了凶手的气味）。

picked的例句：He cautiously picked up the nails（他小心地把钉子拾了起来）；He picked up his suitcase and climbed the stairs（他拎起手提箱，爬上了楼梯）。