what do you have on Mondays?中的Monday为什么加S?意思是你星期一都上什么课? 为什么这个要加S?

what classes do you have on monday? what do you have for lunch on What subjects do you have on Saturday? what classes do you have on Friday? What subjects do you have on Monday? do,have,on,what,you,Thursdays What do you have on Thursdays是什么意思 what do you have on fridays? 回答 what classes do you have on thursdays? (do on have you What Tuesdays)造句 What do you have on Thursdays是什么意思 what do you have on wednesday (中文) What do you have on Monday morning? what do you have on Monday?中文 what do you have on Monday?中文 what lessons do you have on Monday?可以用what subjects do you have on Monday? 应该是what do you have on Monday?还是what do you have on Mondays? “you do on have mondays you what” 连词成句