He smokes three packs of cigarettes a day,which definitely doesharm to his health 这句话为什么用does

来源:学生作业帮助网 编辑:六六作业网 时间:2024/12/23 20:06:57
Hesmokesthreepacksofcigarettesaday,whichdefinitelydoesharmtohishealth这句话为什么用doesHesmokesthreepacksof

He smokes three packs of cigarettes a day,which definitely doesharm to his health 这句话为什么用does
He smokes three packs of cigarettes a day,which definitely does
harm to his health 这句话为什么用does

He smokes three packs of cigarettes a day,which definitely doesharm to his health 这句话为什么用does
which引导的非限制性定语从句是用来修饰前面的整个一个句子,并不是一个名词,所以用单数does.

他每天抽3包烟,‘这’对他的健康有很大伤害。
which指代‘这’,也就是抽3包烟这件事,所以是单数。

上面正解