Cấu trúc thì hiện tại hoàn thành - Present perfect simple:

• Câu khẳng định: S + have/ has + V-ed3+O.
• Câu phủ định: S + have/has + not/never+ V-ed3+O
• Câu nghi vấn: Have/has + S+ V-ed3 +O?
• Câu hỏi với Wh-questions: What/Where/When/Why/How + have/has + S + V-ed3+ O?

Áp dụng cấu trúc, ta có đáp án như sau:

1, Bob has visited his grandma.

2, Tim and Tom have washed their car.

3, My parents have been to a restaurant.

4, Lucy has not done her homework.

5, We have not found the book yet.

6, She has not seen the Lord of the Rings.

7, Mary has not left her phone in a taxi.

8, Has she been late for the meeting? - No, she hasn’t.

9, Have you met her family yet? - No, I haven’t.

10, Have they worked in this company for 15 years? - No, they haven’t.

11, How long has she lived in London? - She has lived in London for 10 years.

12, How much coffee have you drunk today? - I have drunk 5 cups of coffee.

13, What have you done these days? - I have taken care of my sick daughter.

14, Where have your parents gone? - They have gone to London.

15, Why has it rained so much in this winter? - Because there has been changes in climate.