1.The internet has been used all over the world.(HTHT)

2. Many trees were planted in the school garden.( QKĐ)

3. My book has been taken away.(HTHT)
4. I was not helped with my homework.(QKĐ)
5. English has been learnt by for 3 years.(HTHT)
6. Books are often read by my father before bedtime.(HTĐ)
7. Some comic books were brought for Lan's brother by her.(QKĐ)

8. A letter was received by my síster yesterday.(QKĐ)
9. The problem can be solved in just 2 minutes.(bị động với đt khuyêts thiếu)

CT:THÌ HTHT:S+have/has+bêen+P2+(place)+by O+(time)

THÌ QKĐ:S+was/were+P2+(place)+by O+(time).

THÌ HTĐ:S+is/are+P2+(place)+by O+(time).

Bị động với đt khuyêts thiếu:S+can/might/.....+be+P2+(place)+by O+(time)..

Gửi bạn đáp án:

Câu 1: People have used the Internet all over the world.
-> The internet has been used all over the world.
Câu 2 : We planted many trees in the school garden.
-> Many trees were planted in the school garden.
Câu 3: Someone has taken my book away.
-> My book has been taken away.
Câu 4: He didn't help me with my homework.
->  I was not helped with my homework.
Câu 5: We have learnt English for three years.
-> English has been learnt by for 3 years.
Câu 6: My father often reads books before bedtime .
-> Books are often read by my father before bedtime.
Câu 7: Lan bought some comic books for her brother .
-> Some comic books were brought for Lan's brother by her.
Câu 8: My sister received a letter yesterday .
-> A letter was received by my síster yesterday.
Câu 9: She can solve the problem in just 2 minutes .
-> The problem can be solved in just 2 minutes.

~~~~ Chúc bạn học tốt ~~~~