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1) I couldn't come to the party on time because I got lost
2) Robots will be able to do all of the housework in the future
3) My grandfather could see clearly when he was young
4) Robot won't be able to solve all of our problems
5) In the future, Human drivers will be able to fly without planes
Exercise: Rearrange the words to make sentences
1. come\ I\ got\ time\ the party\ couldn’t\ to\ on\ I\ because\ lost. > I couldn't come to the party on time because I got lost.
2. in the future.\ Robots\ to do\ all of\ will be able\ the housework > Robots will be able to do all of the housework in the future .
3. could\ My grandfather\ he\ young.\ was\ clearly\ see\ when > My grandfather could clearly when he was young
4. won’t be able to\ all of\ Robots\solve\ our problems. > Robots won’t be able to solve all of our problems.
5. In the future,\ be\ able\ planes\ without\ human drivers.\ will\ to\ fly > In the future, human drives will be able to fly without planes .
1. They ……can't………….. go there. They’re too tired.
2. Last week we could go swimming, this week we …can't……
3. I ……couldn't………… speak to him on the phone for three weeks last month.
4. When I was five, I …could……….. swim.
5. Dennis ……will be able to………… play the trumpet after four months.
6. Luke has passed his driving test, now he ……can………… drive a car.
7. Maybe the Smiths …will be able to………………… build a new house next year.
8. At four years old, he ……could………….. read quite well.
9. When Tim was 16, he was a fast runner. He ……could………. run 100 meters in 11 seconds.
10. I’m right-handed. I ……can't…………… write with my left hand.
11. Robots can’t talk mow. In the future, they ……will be able to………. to talk to people.
12. In the past, robots …couldn't………………… make coffee but they can now.
13. My younger brother ………could…………. do sums when he was 5.
14. My sister ………could………… swim when she was 6.
15. ………Can……….. you speak English fluently and quickly?
16. My sister has a sweet voice. She ……can…………. sing English songs beautifully.
17. I like teaching robots. They ……will be able to……………. help us study better.
18. Robots …………will be able to…………. guard the houses in the future.
19. ……Could………….. robots lift heavy things some years ago?
20. In the future, robots …will be able to………….. understand what we say.
1. They ………can't……….. go there. They’re too tired.
2. Last week we could go swimming, this week we …………can't……………..
3. I ……could………… speak to him on the phone for three weeks last month.
4. When I was five, I ……could…….. swim.
5. Dennis ……will be able to………… play the trumpet after four months.
6. Luke has passed his driving test, now he ………can……… drive a car.
7. Maybe the Smiths …………will be able to………… build a new house next year.
8. At four years old, he ………could……….. read quite well.
9. When Tim was 16, he was a fast runner. He ………could……. run 100 meters in 11 seconds.
10. I’m right-handed. I …………can't……… write with my left hand.
11. Robots can’t talk mow. In the future, the ……will be able………. to talk to people.
12. In the past, robots …………couldn't………… make coffee but they can now.
13. My younger brother ………could…………. do sums when he was 5.
14. My sister ………couldn't………… swim when she was 6.
15. ………Can……….. you speak English fluently and quickly?
16. My sister has a sweet voice. She ………can………. sing English songs beautifully.
17. I like teaching robots. They …………can………. help us study better.
18. Robots …………will be able to…………. guard the houses in the future.
19. ………Could……….. robots lift heavy things some years ago?
20. In the future, robots ………will be able to……….. understand what we say.
1. I _________ show you this element right now.
A. canB. couldC. will be able to
2. He _________ phone his mom yesterday.
A. canB. couldC. will be able to
3. I _________ stay at the hotel there next week.
A. canB. couldC. will be able to
4. Paul _________ play the violin excellently
A. canB. couldC. will be able to
5. Mona _________ get this invitation last month.
A. canB. couldC. will be able to
6. We _________ complete in basketball next week.
A. canB. couldC. will be able to
7. They _________ ride their bikes well now.
A. canB. couldC. will be able to
8. Pam _________ take that photo last year.
A. canB. couldC. will be able to
9. Dan _________ repair his computer, he knows it well.
A. canB. couldC. will be able to
10. I _________ cook this tasty cake now.
A. canB. couldC. will be able to
11. Lola _________ run better last year.
A. canB. couldC. will be able to
12. They _________ train in the gym in two days.
A. canB. couldC. will be able to
13. We _________ talk about it for a long time.
A. canB. couldC. will be able to
14. Do you think we _________ park over here?
A. canB. couldC. will be able to
15. _________ you taste the garlic in this stew?
A. CanB. CouldC. Will be able to
16. _________ you understand what he said?
A. canB. couldC. will be able to
17. I don’t think he _________ win the next competition.
A. canB. couldC. will be able to
18. Listen! We _________ hear a train in the distance.
A. canB. couldC. will be able to
I agree with the idea that in the future robots will be very useful to us. Firstly, robots can be made of non-biological materials, rendering them able to withstand environments too toxic, too high or low temperatures, or having other conditions unsuitable for human workers. Secondly, robots do not need to be fed "food" in the traditional sense. They can operate using electricity from a variety of sources. In space, such electricity can come from the sun via solar cells or from fuel carried on board used to make electricity. Thirdly, robots do not get tired, and they can work long hours in dangerous locations that would wear out most astronauts. Fourthly, robots can be equipped with sensors and tools that are more sophisated than the human eyes or ears or hands, rendering robots capable of highly complex tasks. Lastly, robots do not age over time. For long interstellar journeys, they can be placed in a dormant state, to be waken up months or years later ready to go to work. For these reasons and others, robots are ideal machines for use in building space stations on many planets.
1. I________show you this element right now
A. can B. could C. will be able to
2. He_________phone his mom yesterday
A. can B. could C. will be able to
3. I__________stay at that hotel next week
A. can B. could C. will be able to
4. Paul_______play the violin execellently
A. can B. could C. will be able to
5. Mona_________get this invitation last month
A. can B. could C. will be able to
6. We_________compete in basketball next week
A. can B. could C. will be able to
7. They_________ride their bikes well now
A. can B. could C. will be able to
8. Pam_____take that photo last year
A. can B. could C. will be able to
9. Dan________repair his computer, he knowns it well
A. can B. could C,. will be able to
10. I___________bake this tasty cake now
A. can B. could C. will be able to
4 Fill the gaps with can, can't, could, couldn't, will be able to or won't be able to.
- In the past, robots_____couldn’t___ teach in classes, but they can now.
- Robots can't talk now. In 2030, they____will be able to____talk to people.
- Mr Van___could___ run very fast when he was young. Now he____can’t.___ .
- In 2030, robots will be able to talk to us, but they __won’t be able to__ do more complicated things.
- My little sister is very clever. She____can____ already read some words.
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
1. won't be able
2. will be able
3. will be able
4. will be able
5. will be able
6. won't be able
7. will be able
8. won't be able
9. won't be able
10. will be able
Dien : can;can't;could;couldn't;will be able to;won't be able to
1. Tom is ill so he ___can't__ play football with us now.
2. I ____couldn't___ read and write untill was seven
3. Tony ___could___ play the piano very well at the age of 6. He won a second prize music competition
4. She's old but she doesn't have to wear glasses. She ___can__ see very well
5. In 2020,robots will be able to recognise our voice and face but they __won't be able to__ think like humans
1. Tom is ill so he _can't____ play football with us now.
2. I ___couldn't____ read and write untill was seven
3. Tony ___could___ play the piano very well at the age of 6. He won a second prize music competition
4. She's old but she doesn't have to wear glasses. She _can____ see very well
5. In 2020,robots will be able to recognise our voice and face but they __won't be able to__ think like humans
1. Listen! We (can/ could/ will be able/ were able to) hear a train in the distance.
2. I don’t think he (could/ can’t/ won’t be able to/ will be able to) win the next competition.
3. Michael is very proud to (be able to/ can be able/ will be able to/ could be able) play in a jazz-band.
4. When I was five, I (can’t/ couldn’t/ am not able to/ will not be able to) swim.
5. I have to go to a meeting tomorrow night so I (can’t/ wasn’t able to/ couldn’t/ can’t be able to) come to the party. I’m very sorry.
6. We (couldn’t/ won’t be able to/ will can’t/ want be able to) go to the party. We’re going to a wedding.
7. A: Can you lend me some money?
B: Sorry, I (couldn’t/ am not able to/ can’t/ won’t be able to). I haven’t got any either.
8. They (wasn’t able to/ can’t/ won’t be able to/ couldn’t) go. The weather was too bad.
9. She (can’t/ will be able to/ could/ couldn’t) go on holiday next month if her parents give her permission.
10. The fishing boat sank but luckily all the crew (couldn’t/ will be able to/ were able to/ can) save themselves.
11. Robot can (see/ guard/ look at/ look) our houses when we are away.
12. Do you think robots can work longer than people (but/ with/ without/ of) getting tired?
13. My father always (do/ does/ make/ makes) coffee at home instead of going to the coffee shop.
14. Nowadays robots can’t talk to people or play sports, but in the future I think they (can/ could/ will/ do).
15. Will robots able (to recognise/ recognising/ to recognising/ for recognising) our voices?
16. (Can/ Could/ Will/ Do) you walk when you was two?
17. Home robots can do things (such/ like/ with/ of) repairing things around the house or looking after the garden.
18. Our future robot will be able to help us (do/ make/ try/ plant) the gardening.
19. Robot will be very useful for our lives but they use (some/ a little/ very/ too much) energy.
20. Can you (told/ tell/ tells/ telling) me the way how to recycle paper?
21. Parents should control what their kid watch (from/ in/ on/ at) television.
22. Walking to school will help (refill/ reuse/ recycle/ reduce) air pollution.