 Re: since + past tenses
In a way phrases with “since” are like mixed conditionals. Nothing is straightforward. Nevertheless, its multiple functions make this little word interesting. Now draw a (time) line with since in the middle as follows:
…………………………..since………………………..
The following configuration is possible:
1. As adverb of time - Present perfect (before) - past simple (after )
He has been ill since he started work
2. It can come in end position either alone in collocation with ever. (present perfect)
I haven’t seen him since (ever since)
2. Since as a conjunction
- Present perfect simple/continuous before- past simple after
- Present simple before – present perfect after
- Past simple after – Present simple in the main clause
He has been working here since he moved house
Since in a clause can be followed by perfect tense:
It is ages since I have travelled by air.
Since I saw her I can’t stop thinking of her
3. Since - phrases can express temporal location or duration:
I have been lonely since you left (temporal location)
I have been here since three O’clock. (duration)  |