cuse.
10. He hardly knew that two and two _make_ (_made_) four.
11. His experience proved that there _is_ (_was_) many a slip 'twixt the
cup and the lip.
12. Carrie knew that water _is_ (_was_) composed of two gases.
13. It was their duty to _prevent_ (_to have prevented_) this outrage.
14. He was reported _to rescue_ (_to have rescued_) the drowning man.
15. It would have been unkind _to refuse_ (_to have refused_) _to help_
(_to have helped_) him.
16. It would not have been difficult _to prevent_ (_to have prevented_)
the disaster.
17. Where did you say Gettysburg _is_ (_was_)?
18. It was as true as that he _is_ (_was_) listening to me when I said it.
19. It was harder than I expected it would _be_ (_have been_).
20. Homer is supposed _to be_ (_to have been_) born about 850 B.C.
21. When I came I intended _to buy_ (_to have bought_) all Paris.
22. Washington is known _to have_ (_to have had_) many narrow escapes.
23 If you would only wait, your success _will_ (_would_) be certain.
24. Is he very sick? I should say he _is_ (_was_).
25. Who first asserted that virtue _is_ (_was_) its own reward?
26. We have done no more than it was our duty _to do_ (_to have done_).
27. What building _is_ (_was_) that which we just passed?
28. He impressed on us the truth that honesty _is_ (_was_) the best policy.
29. He expected _to see_ (_to have seen_) you to-morrow.
30. He expected _to win_ (_to have won_) the suit, and was astonished at
the decision of the court.
31. The result of such constant reading by poor light would have been _to
destroy_ (_to have destroyed_) his sight.
32. It would have given me great satisfaction _to relieve_ (_to have
relieved_) him from his distress.
33. Who would have thought it possible _to receive_ (_to have received_) a
reply from India so soon?
34. It would have been better _to wait_ (_to have waited_).
35. I should like _to hear_ (_to have heard_) the speeches of Hayne and
Webster.
36. The furniture was _to be_ (_to have been_) sold at auction.
37. It was a pity I was the only child, for my mother had fondness of
heart enough _to spoil_ (_to have spoiled_) a dozen children.
38. I am writing to him so that he _may_ (_might_) be ready for us.
39. I have written to him so that he _may_ (_might_) be ready for us.
40. I wrote to him so that he _may_ (_might_) be ready for us.

EXERCISE XLIX.

_Examine the tenses in the following sentences, explain any errors