from then on与since than在用法上有什么区别

来源:百度知道 编辑:UC知道 时间:2024/09/23 10:28:20
哪个该用现完,哪个该用过去时?
辅导书上有句:From then on,nobody has caught that disease.
Frome then on,they lived together happily.
是不是两种都可以?

since than用现完
from then on过去时,现完都可以
只要有since就用完成时

都用现完,SINCE THEN 用在句末
FROM THEN ON=ever since then(自那时起直到现在) 用在句首
from now on用将来时(意思是自现在起)

大概要根据实际情况判断吧...我英语书上也有这句话