1) Mary could do sums at the age of 7.
2) Could you read and write when you were 6 ?
3) Robots could lift heavy things some years ago.
4) Robots couldn't move easily until recent years .
5) Robots could do all homework.
6) I could read and write.
7) She couldn't sing an English song.
8) I couldn't write a letter to an English friend.
9) I could understand English in coverations .
10) I couldn't write an essay in English.
1. I could play football at the age of 5.
2. Tony couldn't read and write still he was 6.
3. Lan Anh could play the guitar when she was 7.
4. Helen couldn't swim at the age of 8.
5. Miss Hoa could play table tennis when she was young.
6. Robots couldn't do many things in the past.
7. I could read a composition in Spanish at the age of 10.
8. Robots couldn't recognise our faces in the past.
9. Nene could dance very well when she was 11.
10. Alex couldn't play badminton when he was 12.
