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)..