英语句式分解

更新时间2019-02-06 07:26:04

Making energy use completely harmless to the environment is very difficult and usually economically expensive。

请问一下这句话的主谓宾是什么？

书上给的解释是：本句的主语是：Making energy use completely harmless to the environment 。

没看懂他这个解释，麻烦各位给予解答~~ 谢谢~

是的，书上给的解释是对的。

Making energy use completely harmless to the environment 是现在分词短语充当句子的主语；

is 是系动词；very difficult and usually economically expensive 是表语成分；系表结构合成句子的谓语。

Making energy use completely harmless to the environment is very difficult and usually economically expensive.

译文：使能源使用完全无害于环境是非常困难的，而且成本也是非常昂贵的。

该句是“主系表”句型，主语是“Making....environment”（动名词短语）；谓语是系动词“is”；表语是“very....expensive.”（两个用“and”连接的并列表语）。

这是一个递进句，and后有另外一层意思。