🛡️ Grammar: The Passive Voice
1ère Bac Sciences et Technologies Elécriques STE
📌 Introduction
We use the passive voice when the focus is on the action, not the person who did it. It’s common in science reports and formal writing.
📚 Structure
Present Simple: The experiment is done every week.
Past Simple: The results were published yesterday.
Future: The project will be presented tomorrow.
With “by”: The theory was discovered by Einstein.
🔬 Science Use
In science, we often use passive voice to focus on results, not people:
Instead of: “We discovered the bacteria.” → Passive: “The bacteria were discovered in 2020.”
Instead of: “Scientists measured the temperature.” → Passive: “The temperature was measured every hour.”
✅ Exercise 1: Change to Passive (Present)
1. They do the experiment. → The experiment ___ by them.
2. We use this lab. → This lab ___ by us.
3. Students write reports. → Reports ___ by students.
4. The teacher explains the lesson. → The lesson ___ by the teacher.
5. They observe the plants. → The plants ___ by them.
✅ Exercise 2: Change to Passive (Past)
1. They published the results. → The results ___ by them.
2. She wrote the report. → The report ___ by her.
3. Scientists discovered the virus. → The virus ___ by scientists.
4. They completed the project. → The project ___ by them.
5. The team analyzed the data. → The data ___ by the team.
✅ Exercise 3: Future Passive
1. They will present the project. → The project ___ by them.
2. We will finish the lab work. → The lab work ___ by us.
3. The school will award the prize. → The prize ___ by the school.
4. They will publish the findings. → The findings ___ by them.
5. The teacher will correct the exams. → The exams ___ by the teacher.
✅ Exercise 4: Active to Passive
1. They grow plants in the lab. → Plants ___ in the lab.
2. The student passed the test. → The test ___ by the student.
3. We use microscopes every day. → Microscopes ___ every day.
4. The team won the science fair. → The science fair ___ by the team.
5. She wrote a book about biology. → A book about biology ___ by her.
✅ Exercise 5: Passive to Active
1. The experiment is done daily. → We ___ the experiment daily.
2. The results were published. → Scientists ___ the results.
3. The project will be presented. → They ___ the project.
4. The data is analyzed. → The team ___ the data.
5. The theory was proven. → Einstein ___ the theory.
✅ Exercise 6: Correct the Mistake
1. The book were written by her. →
2. The experiment are done every week. →
3. The results was published. →
4. The lab are cleaned daily. →
5. The project will be present tomorrow. →
✅ Exercise 7: Science Context
1. The DNA ___ in 1953. (discover)
2. The chemicals ___ every month. (test)
3. The new robot ___ next week. (present)
4. The theory ___ by many scientists. (accept)
5. The data ___ by the computer. (analyze)
✅ Exercise 8: Fill in the Blank
1. The homework ___ by the students. (complete)
2. The message ___ yesterday. (send)
3. The building ___ next year. (build)
4. The rules ___ every class. (explain)
5. The samples ___ in a special container. (store)
✅ Exercise 9: Choose the Correct Passive
1. The experiment ___ tomorrow.
2. The discovery ___ last year.
3. The lab ___ every day.
4. The project ___ by the end of the week.
5. The results ___ in the newspaper.
✅ Exercise 10: Write in Passive
Change to passive voice:
1. They do the experiment. →
2. She wrote the report. →
3. The team will present the findings. →
4. We use this microscope. →
5. Scientists discovered the new species. →
