since
sincepreposition
UK/sɪns/US/sɪns/
A2from a time in the past until now
- I've lived here since 2015.
- She's been waiting since nine o'clock.
sinceconjunction
UK/sɪns/US/sɪns/
FROM A TIME
A2from a time in the past when something happened until now
- I've known him since we were children.
- What have you been doing since you left school?
BECAUSE
B1because, or as a result of the fact that
- Since it's raining, let's stay inside.
- I'll go, since nobody else wants to.
sinceadverb
UK/sɪns/US/sɪns/
B1from a time in the past until now
- He left in May and I haven't seen him since.