from then 与 since that time 有什么区别

Question

如题所述

Answer 1

from then on
since then
1. 中文意思略有不同
from then on 从那时起
since then 从那时起一直到现在
2. 谓语时态不同
from then on 谓语用过去时
since then 谓语用现在完成时。
3. 例句
From then on I made up my mind to work hard. 从那时起，我下定决心好好学习。
Since then I haven't seen him. 自从那时起到现在，我就一直没有见到他。

Answer 2

since then一般用于现在完成时 eg:Since then,they haven't got on well each other.
from then on一般用于过去时和完成时。

Answer 3

that是那个的意思，是代词。而then是然后的意思，是介词。