"now and then"的近义词是“sometimes”还是“always”?

from time to time,now and then,sometimes的区别 every now and then 还是 now and then?表示不时? now and then的意思是“有时”还是“经常”? sometimes是不是等于now then? now and then 和 now and again 的区别? _____ give up,and then you can succeed.A.Always B.Sometimes 关于now and then的英语问题 now and then 作文,Then and now now and then和every now and then的意思完全相同吗? now and then 与 every now and then 的区别是什么? 英语造句题要求：用uaually、often、always和every now and then、all the tim