These students have a toothache.改为一般疑问句
问题描述：
These students have a toothache.改为一般疑问句
答
do these students have a toothache?
答
Do these students have toothache?
答
do these students have a toothache?
have 意思“有”时；可以有2种改法：i have a book.---- have you a book?or:do you have a book?
have是其他意思时,则要用助动词do,如上题.