In southern Asia winds called monsoons are dry and cool in the winter,when they blow from the land.

题目

In southern Asia winds called monsoons are dry and cool in the winter,when they blow from the land.
请问 在这句话中 when they blow from the land.是定语从句吗?怎么看的?

答案

是定语从句,先行词是winter,when 替代了winter 在从句中做状语.