You need to wear warm clothes on these cold days.(改为一般疑问句）回答是Need you wear.还是Do you need to.
问题描述：
You need to wear warm clothes on these cold days.(改为一般疑问句）
回答是Need you wear.还是Do you need to.
答
Do you need to wear warm clothes on these cold days?
答
Do you need to wear warm clothes these old days?
答
是Do you need to
答
Do u need to wear...
答
应该是 Do you need to wear warm clother on these cold days.
因为 need 在这里充当的是实义动词.它后面接的是不定式.
如果它后面接的是动词原形,就是充当情态动词的成分,改成疑问句时,一般情况下只把need 提前就可以了