What time do the Reads usually have supper?为什么用have,怎么不用for,

What time do the Reads usually have supper?为什么用have,怎么不用for, What time do the Reads usually have supper? what do you often have for supper?为什么用for不用at? What time do___(read reads theread thereads)usually have sup What time do your sister have supper? What do you have for supper? 翻译：what do you have for supper? What do you usually have for breakfast? What do you usually have for Thanksgiving? what do you usually have for meals? What do you usually have for lunch? What do you usually have for breakfast.