用：I've never taken the plane before.
I'd never taken the plane before.是過(guò)去完成時(shí).過(guò)去完成時(shí)用于發(fā)生在過(guò)去的過(guò)去的動(dòng)作中,而且用過(guò)去完成時(shí)的句子中常會(huì)出現(xiàn)以下時(shí)間短語(yǔ)：before 1998(一過(guò)去年份/時(shí)間,或過(guò)去發(fā)生的動(dòng)作),by the end of sth.等.例如：
I'd learnt 6,000 English words by the end of last semester.
The train had left the station before they arrived.
由于你是此刻和坐在你旁邊的人說(shuō)這一句話(huà),所以用現(xiàn)在完成時(shí)就可以了.如果你是在過(guò)去和那人說(shuō)這話(huà),就該用I'd never taken.