henceforth
1.henceforth比henceforward普通，但除了在正式的文字里以外，现在也比较少用。
2.henceforth和thenceforth不同。henceforth作“从现在起”解。例如：Henceforth I shall be more careful. thenceforth作“从那时候（指过去或未来的）起”解，如Thenceforth I was more careful和He will graduate next year, thenceforth he will do his best to serve the people。
