UNIT 6: LEARN

I. LÝ THUYẾT (THEORY)

A. TỪ VỰNG (VOCABULARY)

B. NGỮ PHÁP (GRAMMAR)

Chủ điểm ngữ pháp: can, could, be able to

1. Can
   • Cấu trúc:
     • Khẳng định: S + can + V-inf
     • Phủ định: S + can’t + V-inf
     • Nghi vấn: Can + S + V-inf?
   • Cách dùng:
     • Diễn tả khả năng hiện tại.
     • Diễn tả sự cho phép.
     • Ví dụ: I can speak English. / You can go now.
2. Could
   • Cấu trúc:
     • Khẳng định: S + could + V-inf
     • Phủ định: S + couldn’t + V-inf
     • Nghi vấn: Could + S + V-inf?
   • Cách dùng:
     • Diễn tả khả năng trong quá khứ.
     • Diễn tả sự lịch sự khi xin phép.
     • Ví dụ: I could swim when I was six. / Could I borrow your pen?
3. Be able to
   • Cấu trúc:
     • S + be (am/is/are/was/were/will be) + able to + V-inf
   • Cách dùng:
     • Diễn tả khả năng trong tất cả các thì (quá khứ, hiện tại, tương lai).
     • Thường dùng thay thế “can/could” khi cần chia động từ ở thì khác.
     • Ví dụ: I was able to fix the bike. / She will be able to attend.

II. BÀI TẬP & ĐÁP ÁN CHI TIẾT (EXERCISES & ANSWERS)

Bài 1: Hoàn thành câu với “can”, “could” hoặc “be able to” (chia thì đúng).

1. She ______ read when she was four.
2. I ______ finish the homework yesterday, so I was happy.
3. We ______ speak three languages now.
4. He ______ not drive last year, but now he ______.
5. Will you ______ come to the party tomorrow?

Đáp án:

1. could
2. was able to
3. can
4. couldn’t / can
5. be able to

Bài 2: Chọn đáp án đúng.

1. My brother ______ run very fast when he was a child.

a. can

b. could

c. be able to

2. I ______ help you tomorrow if I have time.

a. can

b. could

c. will be able to

3. She ______ play the violin now.

a. could

b. can

c. be able to

4. We ______ finish the project last week.

a. are able to

b. could

c. were able to

5. They ______ visit the museum next weekend.

a. will be able to

b. are able to

c. can

Đáp án:

1. b. could
2. c. will be able to
3. b. can
4. c. were able to
5. a. will be able to

Bài 3: Viết lại câu sử dụng cấu trúc đúng với “can/could/be able to”.

1. I knew how to swim when I was five.
   → I ______ swim when I was five.
2. She managed to answer all the questions.
   → She ______ answer all the questions.
3. He will manage to come to the meeting.
   → He ______ come to the meeting.

Đáp án:

1. could
2. was able to
3. will be able to

Bài 4: Viết đoạn văn ngắn (5–6 câu) nói về kỹ năng học tập và khả năng của bạn, sử dụng “can, could, be able to”.

Gợi ý mẫu:

I can speak English and a little Japanese. When I was younger, I could draw very well. Last year, I was able to win a school art contest. Next month, I will be able to join a new English class. I hope that one day I will be able to travel abroad for my studies.