Give the correct perfect tense of the following verbs to complete the following sentences.
1. I __________ (write) books ever since I retired.
2. We __________ (be) friends since childhood.
3. Joan of Arc __________ (be) called the "Maid of Orleans."
4. I __________ (teach) grade six since 2003.
5. They __________ (move) to the new house for a month.
6. He __________ (memorize) the poem already.
7. Her father __________ (look) for a better job last week.
8. The couple __________ (fly) to New York already.
9. The little girl __________ (be) there again and again.
10. Her grandmother __________ (be) sick for a long time.
