these day还是these days请简要分析一下两者何时用，有什么区别

how is it gong后加in these day还是加during these day these day还是these days请简要分析一下两者何时用，有什么区别 I can't sleep （ ） these day every day与these days的区别 Day After Tomorrow的《These Days》 歌词 These day our teacher teaches us English____ These boys play football every day,对every day提问 Where have you ___ these day 用been 还是gone请详解, we are getting ready _______the test these day.告诉我为什么？ How is your father these day怎么回答 look at these (photo),please victor(wctch)tv every day We are free these day哪里错了 We're free these day.这句话错在哪 It is r____ these day,so it is very wet. These day we ___(go) over our math lesson what _____ Mr wang _____(do) these day? There has been plenty of rain these days.It has rained--- --- these day. these days'和these day's有什么区别?急啊,谢谢大家