now and then 和from time to time是近义词组吗?

now and then 和from time to time是近义词组吗? from time to time,now and then,sometimes的区别 from then on与from time to time与now and then区别 英语语法是否正确?jast now and then=from time to time=at times =somet 英语 from time to time 和 all then time 的区别 快! from time to time from that time on 和from then on用法相同吗? once upon a time before now is now and then is now .是什麼意思 However,we do communicate successfully from time to time.And from ever since和since then和after that time和from then on的区别? 英译汉：from time to time time and again 有这个词组吗