Rome can be pricey for travelers, which is why many choose to stay in a
hostel (旅社). The hostels in Rome offer a bed in a dorm room
for around $25 a night, and for that, you’ll often get to stay in a
central location (位置) with security and comfort.
本句是2021年新高考全国卷I(乙卷)的阅读理解A中的句子。这里的 which 可以换成 that 吗?习惯上听到的都是 that’s why… 的用法。
你的句子不可以换成 that is why…,这里的 which 引导的是非限制性定语从句,关系代词 which 指代前的句子说的内容。若一定要换成 that,就应加上连词 and,使之构成并列句。如:
Rome can be pricey for travelers, and that is why many choose to stay in a hostel (旅社). The hostels in Rome offer a bed in a dorm room for around $25 a night, and for that, you’ll often get to stay in a central location (位置) with security and comfort.
再举几例。下面句子中的 which is why 也不能换成 that is why,但可以换成 and that is why:
Ice is less dense than water, which is why it floats. 冰的密度小于水,所以会浮在水上。
He was called away unexpectedly today, which is why I came to meet you instead. 他今天突然被叫走了,所以才换了我来见你。
I’m afraid he’s more of a talker than a doer, which is why he never finishes anything. 我觉得他说得多,做得少,这就是他始终一事无成的原因。