1) PREP You use since when you are mentioning a time or event in the past and indicating that a situation has continued from then until now.

Jacques Arnold has been a member of parliament since 1987...

She had a sort of breakdown some years ago, and since then she has been very shy...

I've been here since the end of June.

ADV: ADV with v
Since is also an adverb.

When we first met, we had a row, and we have rowed frequently ever since... They went to Dartmouth College together in the 1960s and have frequently done business together since... I returned home to Sussex and have since worked as a solicitor.

Since is also a conjunction.

I've earned my own living since I was seven, doing all kinds of jobs. ...the problems the movie company had had ever since it set up camp on Sketon Island.

2) PREP You use since to mention a time or event in the past when you are describing an event or situation that has happened after that time.

The percentage increase in reported crime in England and Wales this year is the highest since the war...

He turned out to have more battles with the Congress than any president since Andrew Johnson.

Since is also a conjunction.

So much has changed in the sport since I was a teenager... Since I have become a mother, the sound of children's voices has lost its charm. ...a slight accent she had acquired since he last saw her.

3) ADV: ADV with v When you are talking about an event or situation in the past, you use since to indicate that another event happened at some point later in time.

About six thousand people were arrested, several hundred of whom have since been released...

His style of leadership has attracted increasing criticism among his supporters, many of whom have since left Central Office.

4) PHRASE: PHR with v If you say that something has long since happened, you mean that it happened a long time ago.

Even though her parents have long since died, she still talks about them in the present tense.

5) CONJ-SUBORD You use since to introduce reasons or explanations.

I'm forever on a diet, since I put on weight easily...

Since she did not make enough money to live in her own house, she went back to live with her mother.


English dictionary. 2008.