The law must be obeyed.

the law must be obeyed 

=> The law must be obeyed.

1. The tickets are often sold at the gate. 

2. This school was built by the workers 20 years ago. 

3. Some cakes are made every day. 

4. Emails are written by Ngoc every night. 

5. Many books were collected last week. 

6. Their house is not cleaned every day. 

7. The postcard was not received by Thao at Tet.

Chuyển sang câu bị động

People don't always admire this picture. - this picture isn't always admired 

He doesn't use milk for making butter and cheese. - milk isn't used for making butter and cheese

They didn't order him to take a long rest. -he wasn't ordered to take a long rest

The publisher was publishing his book. - his book was being published by the publisher

I dislike people making jokes about me. - i dislike being made jokes about

Compost was made from vegetable matter many years ago by the farmers

We have been teaching English for many years

We were taught English many years ago

He let gone out alone by me

We have my bike repaired by this man

1. We were taught English many years ago.

2.He let me be gone out alone

3. We have my bike repaired by this man

1. My father bought this house two years ago

This house was bought by my father two years ago.
2. We have done these homework carefully.

These homework have been done carefully.
3. People recycle car tires to make pipes.

Car tires are recycled to make pipes.
4. The workers will build a new school in my town.

A new school will be built by the workers in my town.

5.English is spoken all over the world

2. These exercises have been done carefully.

những câu còn lại bạ Ngọc Nam làm đúng rồi em nhé!

4, a cake wasn't cut with a sharp knife by Mary
5, these machine aren't used

C1.Somebody took some of my books away

=> My books were took away by somebody

C2.This boy didn't break the window

=> The window wasn't broke by this boy

C3.Teacher sometimes tells us a story

=> We are sometimes told a story by teacher

C4.Mary didn't cut a cake with a sharp knife

=> The cake wasn't cutted with a sharp knife by Mary

C5.They don't use these machine

=> The machines aren't used by them

1. Pecils aren't provided at the test, ...

2. We weren't taught be Mr. Binh last semester.

3. That experiment is done by the students and their teacher.

4. Was this dictionary bought ...

1 Were they noticed to swim in pool? 

2 I was made to wash shoes carefully

3 It is said that he worked 2 years ago