1. I suddenly remembered where I’d left my keys while I was waiting for the bus.

=> Waiting.....................................................................................................................................................

2. I slipped because I was trying to run in the rain.

=> Trying.......................................................................................................................................................

3. I felt quite sorry for Tim when I saw him cry.

=> Seeing........................................................................................................................................................

4. John was depressed because he knew he was going to fail the exam.

=> Being...........................................................................................................................................................

5. Georgia didn’t know any Japanese, so she used a phrase book when she was there.

=>Not...............................................................................................................................................................

6. The reason why I’m quite good at basketball is that I’m quite tall.

=> Being...........................................................................................................................................................

7. Ed can afford three holidays abroad each year because he has a lot of money.

=> Having.........................................................................................................................................................

8. Maria began to worry when she realized she was lost.

=> Realizing......................................................................................................................................................

b. Combine the sentences using when or while. (Kết hợp các câu sử dụng when hoặc while.)

1. I was waiting for my taxi. My luggage was stolen.

→ I was waiting for my taxi when my luggage was stolen.

2. (The family went to bed.) They were sleeping. The heater broke down.

→ The family went to bed. While

3. We were watching TV. We got a message saying that our flight was canceled.

4. (The waiter gave us a menu.) We were ordering. People started running to the bathroom.

5. He was taking photos. A camel chased after him

: Find and correct the mistakes.

1.       While John was sleeping tonight, someone stole his car. last night

2.       Sammy waited for us when we got off the plane. was waiting

3.       While I was write the email, the computer suddenly went off. writing

4.         What you were doing when you broke your leg? were

5.       Last night at 6 PM, I had dinner. was having

6.       At midnight, we were still drive through the desert. driving

7.       Yesterday at this time, I was siting at my desk at work. sitting

8.       He constantly talked. He annoyed everyone.

9.       I didn't like them because they was always complaining.

I made a presentation in front of 500 people when the microphone stopped working.

Exercise 4: Rewrite the story using relative clauses. Using who,

which, that, where, and

I was sitting in a café. I often go there for a drink after work. I called the waiter. I know him quite well. I asked for a cup of coffee. While I was waiting I looked at a newspaper. It was lying on the table. I started reading an article on the front page. It said: ‘Police are looking for a woman, Catherine. She has been missing from her home for two weeks.’ I looked at the photo. It showed a woman with dark curly hair, she had a round face. I recognized it at once. She was my new neighbor. She had moved in just 2 weeks before.

….………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………

Study sentences 1- 4. Then match them with rules a-d. Which tenses do we use in each sentence? How do you say when and while in Vietnamese?

1. We were waiting for a bus when I took this photo.

2. The girl was wearing a colourful dress.

3. They saw my Manchester United shirt.

4. While I was talking to him, my sister was learning Japanese words.

Choose the correct words.

He saw a big fish while / as soon as he was swimming across the lake.

As soon as / While I saw it, I swam away.

When / While he saw the accident, he went to help.

My dad was waiting for me at the station when / while I arrived.

I kissed my grandmother as soon as / while she opened the door.

We were standing at the bus stop when I while it started to rain.

While / As soon as we were exploring the mountain, we saw a deer.

Elena fell over as soon as / while she was playing tennis.

Tìm lỗi sao

1. It was raining so heavily while we arrived at the beach.

2. I was coming home this morning when i was seeing Kate waiting at the bus stop.

3. When he was calling me, I was doing the cooking for dinner.

4. He putted the letter on the table and then he go out to take a taxi.

5.While we talked, someone in the same room was recording our conversation

6. While Hung arrived at the airport, his family and close friends were waiting for him

7. Actually, during I came to see you this morning, I just wanted you to help me.

8. We played some games, teaching the disadvantaged children and gave clothes to them.

1. I _______ for a very long time, so I _______ very angry with them.

A. had been waiting - was

B. have been waiting - was

C. have waited - was

D. have been waiting – am

2. I'm sad to think that all my plants _____ by the time I _______ from holiday. A. will die - return

B. died - returned

C. may have died - have returned

D. had died - could return

3.Though world food production ________ since 1950 people still ________ from shortages in various parts of the world.

A. has been doubing - may be suffering

B. has doubled - suffer

C. had been doubled - could be suffering

D. has been doubled – suffers

4. For several years now she _______ as private secrectary to the bank manager.

A. worked

B. has been working

C. was working

D. works 

5. In the past 50 years, that country _______ through 15 consitutions, I8 coups and 21 prime ministers.

A. has been going

B. goes

C. were going

D. has gone

6. She was still working a eight o'clock yesterday evening.

She _______ since six o'clock in the morning.

A. has worked

B. has been working

C. worked

D. had been working

Giải thích giúp luôn ạ

I. Complete the following sentences.

1. They often listen to the radio while.........................................................

2. It was rainning when................................................................................

3. ..........................................................................when the lights went out.

4. The doorbell rang while ..........................................................................

5. ..................................................................while I'm waiting for the bus.

6. She was doing her shopping when.........................................................