自从: since 短语和例子自从去年至今他未回过家。he hasn't been home since last year. 自从实行新的管理制度以来, 这个厂的生产有了很大发展。 since the new management system was put into effect, the production of this factory has increased tr
自从开始下雨以来: my wound has been aching ever since it started to rain