Bài tập 1: Viết lại câu với từ gợi ý

1. He spent lots of time doing this experiment.

   • It took him a lot of time to do this experiment.

2. Anna spent three days visiting Japan.

   • It took Anna three days to visit Japan.

3. I spend two hours doing my homework everyday.

   • It takes me two hours to do my homework everyday.

4. It took me all the morning to prepare for lunch.

   • I spent all morning preparing for lunch.

5. It took my son three years to study in this college.

   • My son spent three years studying in this college.

6. It took us three hours to finish the homework last night.

   • We spent three hours finishing the homework last night.

Giải thích:

• "It takes/took (someone) (time) to do something" dùng để diễn tả ai đó tốn bao nhiêu thời gian để làm gì.
• "Someone spends (time) doing something" dùng để diễn tả ai đó đã dùng bao nhiêu thời gian để làm gì.

Bài tập 2: Viết lại câu với từ gợi ý

1. It's a good idea for her to wear a warm coat.

   • She should wear a warm coat.

2. It's a good idea for you to read a lot.

   • You should read a lot.

3. It's a good idea for him to ride a bike.

   • He had better ride a bike.

4. It isn't a good idea to travel by air during the storm.

   • You shouldn't travel by air during the storm.

5. It isn't a good idea for you to put much salt into the soup.

   • You shouldn't put much salt into the soup.

6. You should put your money in the bank.

   • You had better put your money in the bank.

7. It's good if you say 'thank you' to your friends.

   • You should say 'thank you' to your friends.

8. I am not happy when children lie to their parents.

   • Children shouldn't lie to their parents.

Giải thích:

• "Should" dùng để đưa lời khuyên nhẹ nhàng.
• "Had better" dùng để đưa lời khuyên mạnh mẽ hơn, mang tính cảnh báo nếu không thực hiện.
• "Shouldn't" (should not) dùng để khuyên không nên làm gì.