Task 4 - Read the Learn this! box. Underline the past modal verbs in the dialogue in exercise 1 - SHS Friends Global 11 page 64

1. Nội dung câu hỏi

a We use may/might / could have + past participle for speculating about past events.

She may/might/could have gone home hours ago. (= It's possible she went home hours ago.)

b We use may/might not have + past participle (but not could not have) as the negative.

She didn't phone. She might/may not have known my number: (= It's possible she didn't know it.)

c We use must have and can't / couldn't have + past participle to make logical deductions about the past.

You can't/couldn't have seen Louis in town. He lives abroad now. (= It's not possible that you saw him.)

You must have seen somebody who looks like him. (= That is the only possible explanation.)

d We use should/shouldn't have + past participle to criticise past actions.

You should have phoned her before you went out.

You shouldn't have used all the credit on your phone.

Freya: I can't find my camera, Archie.

Archie: There it is. It's under your bag. Why do you have to bring it to class?

Freya: I must take it to my photography class today. By the way, I didn't understand that email you sent

me yesterday.

Archie: I didn't send any emails yesterday.

Freya: Well, you might have sent it earlier. But I got it yesterday.

Archie: I can't have sent you an email. My phone hasn't been working for a week.

Freya: Somebody must have used your account. The email had a link to a competition, but when I clicked on it, nothing happened.

Archie: Oh no! You shouldn't have clicked on the link. You've possibly downloaded some malware onto your phone.

Freya: That's terrible! You should have warned me earlier.

Archie: I didn't know! Anyway, you might not have downloaded anything. It's possible that you were lucky. You just need to wait and see.

Freya: Anyway, you need to warn your other friends. That email could have gone to everybody in your address book!

2. Phương pháp giải

Đọc khung Learn this! Gạch dưới các động từ khuyết thiếu trong quá khứ trong đoạn hội thoại ở bài tập 1.

3. Lời giải chi tiết

Freya: I can't find my camera, Archie.

Archie: There it is. It's under your bag. Why do you have to bring it to class?

Freya: I must take it to my photography class today. By the way, I didn't understand that email you sent

me yesterday.

Archie: I didn't send any emails yesterday.

Freya: Well, you might have sent it earlier. But I got it yesterday.

Archie: I can't have sent you an email. My phone hasn't been working for a week.

Freya: Somebody must have used your account. The email had a link to a competition, but when I clicked on it, nothing happened.

Archie: Oh no! You shouldn't have clicked on the link. You've possibly downloaded some malware onto your phone.

Freya: That's terrible! You should have warned me earlier.

Archie: I didn't know! Anyway, you might not have downloaded anything. It's possible that you were lucky. You just need to wait and see.

Freya: Anyway, you need to warn your other friends. That email could have gone to everybody in your address book