rainy days often make people sad.改为一般疑问句讲清楚为什么.用助动词do还是does.

rainy days often make people sad.改为一般疑问句讲清楚为什么.用助动词do还是does.
rainy days often make people sad.改为一般疑问句
讲清楚为什么.
用助动词do还是does.

rainy days often make people sad.改为一般疑问句讲清楚为什么.用助动词do还是does.
Do rainy days often make people sad.?
days是复数,make是实义动词所以用助动词do

Do rainy days often make people sad？
主语 rainy days 是复数，谓语动词要用复数的do

Do rainy days often make people sad?
用do 因为主语是rainy days，而在rainy days中， days是中心词，是复数，所以用do

Do rainy days often make people sad?
因为days是复数，does用于第三人称单数