✈️ a) Kinh nghiệm sống (Experience)

👉 Dùng thì Present Perfect để nói về kinh nghiệm sống (một khoảng thời gian từ quá khứ đến hiện tại).

• 📌 "Have you read Hamlet?" - "No, I haven't read any of Shakespeare's plays."
• 📌 How many times have you been to the United States?
• 📌 Susan has seen that film eight times.
• 📌 Sam has lived in Belfast all his life.

🏆 b) So sánh nhất + Present Perfect

• 🎬 It's the most boring film I've ever seen.
• 📖 This is the longest book I've ever read.

🔄 c) Cấu trúc "It's the first time..."

• ✅ Tom has lost his passport again. It's the second time he has lost it.
• ✅ Is this the first time you've been in hospital?

⏳ d) Diễn tả hành động chưa làm / chưa xảy ra trong khoảng thời gian

• 🚭 I have never smoked. (chưa bao giờ hút thuốc)
• 📅 I haven't smoked for three years. (đã 3 năm chưa hút)
• 📅 I haven't smoked since September. (kể từ tháng 9)
• ✉️ Jill hasn't written to me for nearly a month.

📌 For + khoảng thời gian (for three years)
📌 Since + mốc thời gian (since September)