•  1. Tom has played the piano for 4 years.

• 2. I have cooked for the party for 4 hours.

• 3. She has worked as a secretary for 2 years.

• 4. My father has been reading a newspaper for 2 hours.

• 5. My sister has studied English since 2015

• 6. Scientists have been fighting against AIDS in 1980.

• 7. The Browns began to live in London 20 years ago.

• 8. John started working for this electronics firm in 1999

• 9. They began  to work here 10 years ago

• 10. Jack and Bill started learning to drive 2 weeks ago.

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