Unit 12: Robots
Part 3: Grammar
Language focus - can/could for ability
🟡 Trung bình60 phút
Language Focus: Can/Could for Ability
11. Can/Can't for Present Ability
Cấu trúc:
- Khẳng định: S + can + V (nguyên mẫu)
- Ex: Robots can do housework.
- Phủ định: S + can't (cannot) + V
- Ex: Robots can't think like humans.
- Nghi vấn: Can + S + V?
- Ex: Can robots understand people?
22. Could/Couldn't for Past Ability
Cấu trúc:
- Khẳng định: S + could + V (nguyên mẫu)
- Ex: In the past, robots could only do simple things.
- Phủ định: S + couldn't (could not) + V
- Ex: Ten years ago, robots couldn't recognize faces.
- Nghi vấn: Could + S + V?
- Ex: Could robots talk?
33. So sánh Can và Could
| Can (Hiện tại) | Could (Quá khứ) |
|---|---|
| Modern robots can recognize faces. | Past robots couldn't recognize faces. |
| I can play football now. | I could swim when I was 5. |
| Robots can lift heavy things. | Early robots couldn't lift much. |