On the giant plane there are ___ the jet needs

问题描述:

On the giant plane there are ___ the jet needs
A.twice engines than
B.twice as engines as
C.as twice many engines as
D.twice as many engines as
为什么选D,C我知道是倍数词要在前面.
我选的A,怎么错了?为什么非要用asas,than不行吗.
而且就算要用as as固定搭配表达为什么B错了.many不能替换?

On the giant plane there are ___ the jet needsA.twice engines thanB.twice as engines asC.as twice many engines asD.twice as many engines as为什么选D,C我知道是倍数词要在前面.我选的A,怎么错了?为什么非要...那B什么错了。many在句子里的作用是什么,为什么不是AS AS,而是as many asB错了是因为第一个as是副词,后面要跟形容词原级。many就是形容词,在句子里表示“跟。。。那么多”,as ... as的句型是:twice/基数词+times+as+adj+as“ 两/N倍的那么adj”,twice as much/ many as,译为“两倍那么多”,twice as large/ big as,译为“两倍那么大”,