赖世雄教你学英语语法
关系词
1-6：which可代表前句中部分概念
关系代词which亦可用以代替前句中的部分概念，which之前亦一定要有逗点
例：we spread our clothes in the sun to dry,which they did very quickly.(=and they dried very quickly.)
（我们把衣服摊开晒干，而它们真的很快就干了。）
在本例中的which就代替dry的概念，they则代替our clothes．
例：he smokes three packs of cigarettes a day,which definitely does harm to his health.
（他每天抽三包烟，这样对他的健康一定有害。）
本例中，which代替smokes three packs of cigarettes a day这件事。