what do you have for supper?我就是想问为什么要在have后加个for ,这是怎么回事,请详细说明,谢谢

What do you have for lunch What do you have for supper? what do you have for lunch what do you have for lunch on what do you have for ants?翻译 What do you have for b___? 翻译：what do you have for supper? What do you have for lunch? what do you usually have for breakfast What do you have for b_____? What do you have for a______? What do you usually have for lunch? what,have,do,for,breakfast,you,often(?) what do you have for lunch/答语 What do you usually have for Thanksgiving? what do you usually have for meals? What do you have for dinner?病句吗可以说成what for dinner have do you? what do you have for summer?I have swimming.