a sail is to a boat what an engine is to a car为什么是表语从句

问题描述:

a sail is to a boat what an engine is to a car为什么是表语从句

表语从句就是用一个句子作为表语.说明主语是什么或者怎么样,由名词、形容词或相当于名词或形容词的词或短语充当,和连系动词一起构成谓语.a sail is to a boat what an engine is to a car.船帆对于船来说就是汽车的...