What classes do you have on Thursdays?为什么Thursday后面加s?

What classes do you like? what classes do you have on monday? what classes do you have on Friday? 回答问题What classes do you like? what classes do you have this year? what classes do you have on thursdays? what classes do you __ on wednesday? do in classes what English you do 连词成句 What do you usually do in English classes?怎么回答 What do you do in English classes?怎么回答啊? What classes do you have on Monday?怎样回答 What classes do you have today?怎么 回答 连词成句：do have what you Mondays on classes ? classes,do,what,you,like(?)连词成句 What classes do you have?一天内回答, what classes do you have in the morning是什么意思? what classes do you have翻译成中文 what classes do you have on fridays?怎么回答