Question

when does one use since and for​

Answer 1

Answer:

• since is used as a preposition where we need to mention the continuation of an incident or something's existence
• for is used when we need to mention a duration which is approximate.
• e.g.- ....for 3 years...
• etc.

Plêãsē mårk äs brāíñlîést àñswër....

Answer 2

Explanation:

When you need to explain something relating to duration and when you need to explain something from a particular year, then you use "since". and if you need to explain a duration without a particular date or year, you use "for".

for example Since 1950

for 10 years