on thursday与on thursdays具体的区别

问题描述:

on thursday与on thursdays具体的区别
最好再用具体的句子说明

on thursday意思在星期四,一般特指某个星期四.we had English on Thursday.我们在周四上了英语.具体一次性动作,下周还上不上,不知道.
on thursdays意思是每周四,是个习惯性动作.we have English on Thursdays.我们在周四有英语课.意思是每周如此.