句子“We took off at dawn”.的“take”为什么用这种形式?如题,为什么不用原型呢?

句子“We took off at dawn”.的“take”为什么用这种形式?如题,为什么不用原型呢? 看一下这三个句子哪几个是错的,the plane had taken off when we arrived at the airport.the plane was taking off when we arrived at the airport.the plane took off when we arrived at the airport.为什么.第2个是即将的意思 Well,my dad was out,so we decided to try Da Wei's game.We copied it onto the finished,we took it off the computer.We made quite sure my father disn't notice anything.的重点. After several delays we ( )took off at six o'clock.A.in end B.finally C.final D.at the endB 为什么不能选 D do you know why he is leaving?his plane took off at 11:30.为什么用 took off We ------him off at the airport tomorrow we are late,so the plane__without us A.took off B.turned off C.turned down 翻译.took off took away when i arrived at the airport,the plane___A.took off B.has taken off C.had taken off When the thief saw the policeman,he ___ at once.A flew away B ran away C got off D took off请翻译句子并加以说明原因 the plane took off at 10:30.exactly speaking,at 10:28求翻译 we took some photos ______pandas at the zoo 填介词 We took the boy to the ___________(安全) at once. The plane flying to Xi'an (起飞） at eight this morning 是填take off 还是took off Luckily,I arrived at the airport just --------the plane took off. I took Bus No.4 and got off at Changshu Street .You go north to Hunan The plane took off ()half an half A.in B.after C.at D.for If i took 5 panda coin sets at 20 per cent off what would that cost?