Change the verb into the correct form:
- The students have improved (improve).
- She has become (become) really beautiful.
- Man has invented (invent) many great inventions.
- People have caused (cause) much destruction to the planet.
- I have learnt (learn) to surf.
- The class has done (do) 5 tests this month.
- Allison has found (find) a few problems with your plan.
- We have consulted (consult) some doctors about this.
- I have met (meet) Debbie in the last week.
- In the previous year, we have doubled (double) our income.
- She has been (be) sick since Sunday.
- You have been (be) away for 2 weeks.
- He has hated (hate) cheese since childhood.
- Mark and Katie have been (be) together for two years.
- I have liked (like) mango since my last trip.
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