That is the term being used to describe the invisible yet toxic mixture of gases and particles clinging to smokers’ hair and clothing, not to mention cushions and a carpeting, that lingers long after second-hand smoke has cleared from a room.
请问老师,这里不是引导非限制定从吗,为什么用的that?
这个句子的主语that 指代前句提到的 the third-hand smoke. 即这个句子解释什么是the third-hand smoke. 句子中的that定语从句为限制性定语从句,之所以前面有逗号,是因为that从句与先行词之间有一个插入语,插入语需要用二个逗号分隔。去掉这个插入语,二个逗号就同时消失了。去掉插入语后句子如下:
That is the term being used to describe the invisible yet toxic mixture of gases and particles clinging to smokers’ hair and clothing that lingers long after second-hand smoke has cleared from a room.
在这个句子中,现在分词短语clinging to smokers’ hair and clothing作定语修饰名词词组the invisible yet toxic mixture of gases and particles。that从句作为限制性定语从句,其先行词为名词词组the invisible yet toxic mixture of gases and particles clinging to smokers’ hair and clothing,这个名词词组的中性词为不可数名词mixture,所以that从句谓语动词用单数lingers。
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