Много change the verb into the correct 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. 11. she (be) sick since sunday. 12. you (be) away for 2 weeks. 13. he (hate) cheese since childhood. 14. mark and katie (be) together for two years. 15. i (like) mango since my last trip.

1. The students have  improved.
2. She has  become) really beautiful.
3. Man (invent) many great inventions.
4. Peoplehave  caused) much destruction to the planet.
5. I (have learnt to surf.
6. The class has/have  done) 5 tests this month.
7. Allison has found a few problems with your plan.
8. Wehave  consulted) some doctors about this.
9. I (met) Debbie in the last week.
10. In the previous year, we (doubled) our income.
11. She has been sick since Sunday.
12. You have been away for 2 weeks.
13. Hehas hated cheese since childhood.
14. Mark and Katie have been together for two years.
15. I have liked mango since my last trip.