Since:
it is used for specific past time to the present, perhaps action continues up in the future.
Since is more often used in “Perfect & Perfect continuous tenses”
Examples:
- I have been teaching English since 2019.
- They have been married since 1998.
- She has been studying English since her childhood.
- Since Juila got married, I haven’t met her.
For:
it is used to describe a period of time such as 35 minutes, 5 weeks, or 5 years.
Examples:
- I used to study for 50 minutes a day.
- Ann hasn’t seen her parents for 10 years.
- They have been teaching us for 3 weeks.
- She lived in the USA for 4 months.
