Usage of 以来
The word 以来 is a time-related phrase used to indicate the starting point of an action or state continuing up to the present or a certain point in time. It often follows a specific time expression or event and means "since" or "from that time onward."
Common Collocations
- 自从...以来 (zìcóng... yǐlái): "since..." used to mark the beginning of a period.
- 事件/时间 + 以来: e.g., 疫情以来, 公司成立以来.
Nuances and Usage Notes
Using 以来 emphasizes continuity from a past point to now. It is often used in formal or written contexts but also common in spoken Chinese when discussing time spans.
Unlike 以后 (yǐhòu), which means "after" and points to a future time, 以来 always refers to a past starting point continuing to the present.
Common Confusion
Do not confuse 以来 with 以前 (yǐqián), which means "before." 以来 always looks forward in time from a past event, not backward.
Summary
Use 以来 to express "since" a certain time or event, highlighting ongoing states or actions from that point onward. It is a useful word for talking about durations and changes over time.