The four great Inventions Chinese people _______ paper.invented_____________ invented printing.ChinesepeopleChinese people _______ compass.inventedChinese people _______ gunpowder.Chinese people___________________bicycle. ×didn’tinventNo, ChinesePeople____________________ Telephone. ×Did Chinese people invent telephone?didn’tinventDid Chinese people invent airplane? No ,Chinese People didn’t invent airplane.Did Chinese people invent stem engine?No, Chinese people didn’t invent stem engineDid Chinese people invent the train ?NO , Chinese people _________ _________The train. Did Chinese people invent light bulb? Do you know who is he ? No, Chinese people didn’t invent light bulb. Did Chinese people invent auto- mobile ?No, Chinese people didn’t invent automobile.一般过去时的构成 肯定式 否定式 疑问式 I washed I didn’t wash you washedYou didn’t wash He washed He didn’t wash She washed She didn’t washIt washedIt didn’t washWe washedWe didn’t washTheywashedThey didn’t wash
