"Past Simple of English verbs": HTML5 Crossword

Across

2. What is the Past simple of "go"? (4)
4. What is the Past simple of "love"? (5)
6. What is the Past simple of "teach"? (6)
8. What is the Past simple of "understand"? (10)
11. What is the Past simple of "phone"? (6)
12. What is the Past simple of "take"? (4)
14. What is the Past simple of "swim"? (4)
15. What is the Past simple of "dry"? (5)
16. What is the Past simple of "surprise"? (9)
18. What is the Past simple of "start"? (7)
19. What is the Past simple of "buy"? (6)

Down

1. What is the Past simple of "reply"? (7)
3. What is the Past simple of "can"? (5)
5. What is the Past simple of "study"? (7)
7. What is the Past simple of "stop"? (7)
9. What is the Past simple of "remember"? (10)
10. What is the Past simple of "tell"? (4)
11. What is the Past simple of "play"? (6)
13. What is the Past simple of "arrive"? (7)
17. What is the Past simple of "bring"? (7)