1. have forgotten 2. has the secretary come yet 3. have learned 4. Have you ever been 5. have already informed 6. have ever known 7. has already left for 8. has not received 9. have not heard 10. have not seen 11. have you had 12. have seen 13. have waited 14. has had 15. has worked 16. has been 17. have you ever ridden 18. has not taken
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1. have forgotten2. has the secretary come yet
3. have learned
4. Have you ever been
5. have already informed
6. have ever known
7. has already left for
8. has not received
9. have not heard
10. have not seen
11. have you had
12. have seen
13. have waited
14. has had
15. has worked
16. has been
17. have you ever ridden
18. has not taken