1. Explanation

Since = “언제부터 (시작점)”

Used with a specific point in time (2020, Monday, last year).

For = “얼마 동안 (기간)”

Used with a length or duration of time (3 years, 2 hours, a long time).

2. Examples

Since

• I’ve lived here since 2020.
• She has been sick since last week.
• He’s been my friend since childhood.

For

• I’ve lived here for three years.
• He has worked here for a long time.
• We waited for two hours.

3. Practice

Part A – Multiple Choice

I’ve known her ___ 10 years.

A) since