We use since to say when something started. It shows the start time of an action or event that continues now.
I have lived here since 2010.
She has worked since morning.
Since can join two ideas. It shows the reason or cause of something, like because.
Since it is late, we will stop.
I stayed home since I was tired.
Since here means from a past time to now but is used alone, often after the main action is mentioned.
He hasn’t called since.
They moved away years since.
Since is used often with perfect tenses in formal speech or writing, showing events continuing from a point in the past until now.
Since then, the law has changed.
Since 1990, many things improved.
Sometimes used at the start to mean 'now' or 'then', showing a logical next step in spoken English.
Since, what do you want to do now?
Since, we are here, let’s enjoy it.
