表示地点,在从句中作状语,只能用where,不能用that,如:
We'll stay where he lives for three days.
where在从句中作状语。
当先行词在从句中作地点状语时,
引导词只能用where或者介词+which,此时不能用that。
例如:
This is the house where we used to live three years ago.
This is the house in which we used to live three years ago.
注意比较:
This is the house that we used to live in three years ago
这题为什么可以用that呢?
是因为先行词the house在从句中作in的宾语,所以可以用that。