10 oraciones en present perfect de dos lineas?

I have asked myself, have you ever fallen in love.

Since she has bought a car I haven't seen her walking.

She has been crocheting for ten hours.

They have travelled to europe three times.

We have loved each other since we have seen for the first time.

6 i have read this book for many hours

7 he has worked in BGH since 2008

8 fausto has built houses for twenty five years

9 i have studied english since i was ten years.

10 she has danced ballet for ten years.