1. Where could the horse …………………….? (have gone)
2. Circumstances …………………….. him to leave school when he was just ten. (had forced)
3. He heard that his brother …………………….. (to have arrived)
4. I …………………….. my homework. (have completed)
5. He ……………………. before I reached his place. (had left)
6. The children ……………………….. their homework by now. (have finished)
7. Shakespeare’s plays …………………… into nearly all languages. (have been translated)
8. Indians ……………………….. skilled mathematicians for thousands of years. (have been)
9. The boys performed all the tasks we ……………………. for them. (had planned)
10. He forgave his enemies who …………………….. him. (had wronged)