Ответ:

1. begin - began - begun - begins - beginning 2. blow - blew - blown - blows - blowing 3. buy - bought - bought - buys - buying 4. bring - brought - brought - brings - bringing 5. catch - caught - caught - catches - catching 6. draw - drew - drawn - draws - drawing 7. grow - grew - grown - grows - growing 8. hear - heard - heard - hears - hearing 9. know - knew - known - knows - knowing 10. say - said - said - says - saying 11. sing - sang - sung - sings - singing 12. sit - sat - sat - sits - sitting 13. send - sent - sent - sends - sending 14. sleep - slept - slept - sleeps - sleeping 15. throw - threw - thrown - throws - throwing.

Объяснение: