he bought a new bike last week (改为否定句)

He have already bought a new bike改错 he bought a new bike last week (改为否定句) He said ,“I bought a new bike yesterday. ----He said he had bought a new bike the day before.宾语从句中yesterday为何变为the day before? A new bike was bought for him 还是 has been bought for him after he enteredthe senior middle school. A new bike was bought for him还是 has been bought for him after he entered the key senior middleschool. he said he (C) the new bike for over ten days A.has bought B.has had C.had bought D.had had 原因是只要原因 She said:i bought a new bike. she said she_____ _____ a new bike. Father bought me a new bike 改为同义句 The boy bought a new bike.改一般疑问句 my mum me a bought bike new 连词成句 They bought a new bike yesterday.对They提问.快 they each bought a new bike（同义句） I bought a new bike just nom.(用just改写）I ____just_____a new bike. John also bought a new bike last week 同义句：John bought a new bike last week ____ ___. He wanted to bought a new book. He bought a new car是什么时态 He bought a bike in the mall -----of motorbike . A new bike was bought for him 还是 has been bought for him after he enteredthe senior middle school of the city.为什么?has been bought 为什么错了 错在哪