We use the present perfect (have/has + past participle) to talk about things that started in the past and continue now.
✅ Example:
- How long have you known her?
- We’ve lived together for about nine months.
⏳ 1. Using for
We use for + a period of time (the length).
👉 It answers: How long?
✅ Examples:
- I’ve known Justin for about two years.
- We haven’t done that for a long time.
📅 2. Using since
We use since + the starting point (when it began).
👉 It answers: Since when?
✅ Examples:
- I’ve known her since we were at school.
- We haven’t argued since we met.
🌟 Quick Tip
- for = length of time → 3 months, 2 years, a long time
- since = starting point → 2019, last week, Monday
Present Perfect Review
