No matter what the conditions were,he believed that a car sh

不可以,因为主句谓语是should be driven ,意思,用词都不一样。 再问： a car should be driven as fast as it could possibly go。 句子成份是什么 省略的规则什么 再答： 这里你不顾意思老盯着语法是症结所在 “汽车能走多快便开多快”as it could possibly go是程度状语从句， 修饰 should be driven。 如果主句和从句的谓语动词一致， 从句的主动词可以承前省略， 如： He is running as fast as he can (这里便省了个run) 他正尽快跑着。