@ Mai xin gửi bạn ạ
1. (+) I have finished my homework.
(-) I haven't finished my homework.
(?) Have you finished your homework?
2. (+) My uncle has been to Singapore before
(-) My uncle hasn’t been to Singapore before.
(?) Has your uncle been to Singapore before?
3. (+) They have found their keys.
(-) They haven't found their keys.
(?) Have they found their keys?
4. (+) Jim has just played video games with his brother.
(-) Jim hasn't just played video games with his brother.
(?) Has Jim played video games with his brother
5. (+) My grandmother has visited me since November
(-) My grandmother hasn’t visited me since November.
(?) Has your grandmother visited you since November?
6. (+) My sister has studied Medicine for 2 years.
(-) My sister hasn't studied Medicine for 2 years.
(?) Has your sister studied Medicine for 2 years?
7. (+) It has been long since our last encounter.
(-) It hasn't been long since our last encounter.
(?) Has it been long since our last encounter?
8. (+) We have graduated yet.
(-) We haven’t graduated yet.
(?) Have you graduated yet?
xin ctlhn nếu có thể
chúc bạn học tốt :)))))