from then on 用于过去时态和完成时态如：From then on, the fairy weaver stayed in heaven, and the cowherd stayed on earth.从此，织女留在天上，而牛郎则待在人间。

From then on I made up my mind to work hard. 从那时起，我下定决心好好学习。

①from then on通常连用一般过去时。如：From then on she knew she would win.她从那时起就知道自己会得胜。From then on he refused to talk about it.从那以后他就不再谈这件事了。From then on the whole tone of the campaign began to degenerate.从那时起，整个活动的基调开始变质。

②有时也连用过去进行时。如：From then on, they were taking no chances.从那时起，他们就不再冒险了。They scored three goals in the first half and from then on United were coasting.他们在上半场时了三个球，此后联队就踢得顺风顺水了

from then on是一般过去时态的标志词。

中文意思是“从那时起”

例如，因为中考成绩出来后，我发现英语成绩不尽人意，从那时起，我下定决心要学好英语。

Because after the high school entrance examination results came out, I found that my English results were not satisfactory. From then on, I made up my mind to learn English well.