Question

Change the verb into the past perfect form:

1. The students --------------- (improve).
2. She ------------- (become) really beautiful.
3. Man --------------- (invent) many great inventions.
4. People------------ (cause) much destruction to the planet.
5. I -------- (learn) to surf.
6. The class ---------- (do) 5 tests this month.
7. Allison ---------- (find) a few problems with your plan.
8. We --------------- (consult) some doctors about this.
9. I ---------- (meet) Debbie in the last week.
10. In the previous year, we (double) our income.

Answer 1

Past perfect : S + had + verb (past participle form)

1) had improved

2) had become

3) had invented

4) had caused

5) had learnt

6) had done

7) had found

8) had consulted

9) had met

10) had doubled

Answer 2

1. Have improved
2. Has become
3. Has invented
4. Have caused
5. I’ve learnt
6. Have done
7. Has found
8. Have consulted
9. I’ve met
10. Have doubled