The four great Inventions Chinese people _ paper.invented_ invented printing.ChinesepeopleChinese people _ compass.inventedChinese people _ gunpowder.Chinese people_bicycle. didntinventNo, ChinesePeople_ Telephone. Did Chinese people invent telephone?didntinventDid Chinese people invent airplane? No ,Chinese People didnt invent airplane.Did Chinese people invent stem engine?No, Chinese people didnt 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 didnt invent light bulb. Did Chinese people invent auto- mobile ?No, Chinese people didnt invent automobile.一般过去时的构成一般过去时的构成 肯定式肯定式 否定式否定式 疑问式 I washed I didnt wash you washedYou didnt wash He washed He didnt wash She washed She didnt washIt washedIt didnt washWe washedWe didnt washTheywashedThey didnt wash