from then 与 since that time 有什么区别

from then onsince then1.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 wor...