Word · Frequency #305
since
自…以来；自从
核心释义
from a point in time in the past until now
- 1.
从...开始(指从过去某时持续至今)
From: referring to a period of time ending in the present and defining it by the point in time at which it started, or the period in which its starting point occurred.
从...开始(指从过去某时持续至今)；自...以后；自...以来
用法In use
I have lived here since 2015.
用法提示：此处since为介词，表示“自从……以来”，后接时间点，强调动作持续到现在。
She has been working at the company since March.
用法提示：since作介词，后接具体时间点，表示从过去某时起一直持续的动作。
We have known each other since childhood.
用法提示：since作介词，后接名词childhood，表示从过去某段时间起点至今。
since + [时间点]
作介词时后接表示过去时间起点的名词或名词短语，常与现在完成时连用。
I have worked here since 2015.
我从2015年起就在这儿工作。
since + [事件/名词短语]
这里的名词短语指过去发生的具体事件；不要接句子，接句子时since是连词。
She has felt much better since the operation.
相关词与表达Connections
搭配Collocations
- since then
- 自从那时起
- He missed the deadline on Monday; since then, he has been more careful.他周一错过了截止日期；从那时起，他更加小心了。
- since childhood
- 从童年起
- She has suffered from allergies since childhood.她从小就有过敏症。
- since the beginning
- 从一开始
- We have known about the problem since the beginning.我们从一开始就知道这个问题。
- since last month
- 上个月以来
- The library has been closed since last month.图书馆从上个月起就关门了。
- since the accident
学习提示Learner notes
记忆技巧Memory Tip
since 可记作“时间线的起点”：字母 s 就是起点，从那一点画一条线直到现在，表示‘自从…以来’。
语境与语域Context & Register
语域：neutral 常见场景：日常口语、书面表达 “since”作介词表示“自…以来”，属于中性表达，口语和书面语中都比较常见，通常与完成时搭配使用。
语法说明Grammar Note
since 引导时间状语，后接时间点或从句。
发音与拼写Pronunciation & Spelling
可与 mince /mɪns/、prince /prɪns/、wince /wɪns/、rinse /rɪns/、quince /kwɪns/ 押韵，它们的重读元音和后面的 /ns/ 相同。注意形近但发音不同的词：sense /sɛns/ 元音不同，sins /sɪnz/ 结尾是 /z/，都不与 since 押韵。
高价值词汇High-value vocabulary
该词属于 Oxford 核心词汇，值得优先掌握常见搭配和句型。
用法优先级
Dictionary facts from DICTIONARY_API_DEV, ECDICT, WIKTIONARY.