F12 – Động từ khuyết thiếu & câu đề nghị, lời mời

Nền tảng

1. Động từ khuyết thiếu (+ V nguyên mẫu)

Từ	Nghĩa	Ví dụ
can / could	có thể; xin phép; nhờ lịch sự	Could you send me the file?
should	nên	You should arrive early.
must / have to	phải	Visitors must sign in. · We have to finish by Friday.
don't have to	không cần	You don't have to bring a laptop.
must not / cannot	không được phép	You must not park here.
may / might	có lẽ; được phép	It may rain. · You may leave now.
would	lịch sự (Would you…? / I'd like…)	Would you like some coffee?

Câu hỏi	Nghĩa	Trả lời phù hợp
Would you like (to)…?	Bạn có muốn…?	Yes, please. / I'd love to. / No, thanks.
Why don't we / you…?	Sao chúng ta không…?	That's a good idea. / Sure.
How about / What about + V-ing?	…thì sao?	Sounds great.
Could / Can / Would you…?	Bạn có thể… không?	Sure, no problem. / I'm afraid I can't.
Let's…	Hãy…	OK, let's do that.

should to go ✗ · can speaks ✗
Why don't we…? là đề nghị, không phải hỏi lý do → không trả lời bằng Because…

1. Employees must ------- their ID cards at all times.

2. You ------- see a doctor if you feel sick.

3. ------- you help me move these boxes?

4. Visitors ------- park in the employee parking lot.

5. Ms. Kim can ------- three languages.

6. ------- don't we take a break?

7. Would you like ------- some coffee?

8. We have ------- finish the project by Friday.

9. Passengers ------- not smoke on the plane.

10. You ------- bring your laptop; we have computers here.

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