You need to wear warm clothes on these cold days.(改为一般疑问句）
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
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