“He spent 2 hours playing the piano.”中为什么用“spend”的过去式“spent”

“He spent 2 hours playing the piano.”中为什么用“spend”的过去式“spent” He spent 2 hours _________ the piano.A.play B.played C.plays D.playing he spent five hours in the library.改为一般疑问句 He spent two hours mending his bike .(改为同义句) 英语翻译He spent three hours walking through the forest 还是：He spent three hours walking through the forest on foot he spent about 21 hours in space 对 about 21 hours 提问 He spent 3 hours in the park.对3 hours提问 He spent hours cleaning out the room.(改同义句） He ____ hours ____ ____ out the room.如上所述 他花费4小时打篮球用英语是“he spent 4 hours to play basketball吗 He spent two hours doing his homework last night把句子改成同义句 He spent two hours reading the book(改为同义句)_____ _____him two hours____ ____the book He spent two hours to finish his homework.哪里错了 连词成句 space spent he about hours twenty-one in He spent 5 hours planting the trees.(改为同义句） He spent hours to clean out the room语法错吗 he spent 6 hours — in the room . A locking B locked C locked himself he spent two hours 什么 the game show last night .【watch】 什么是1PL、2PL、3PL、4PL?