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If you should go to the post-office this afternoon, ________(post)these letters for me, please．

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If he should turn up, ________(tell)him that we will be right back．

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If he ________(be sent)to the hospital in time, his life could have been saved．

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If you ________(be)in good health, we would have asked you to join us in the camping trip．

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Were they still in London, Mr．Smith ________(may see)them．

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Should he have gone out, we ________(can leave)a note there．

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Had he studies a little harder, he ________(pass)the exam．

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Had she known that the necklace wasn't a real one, things ________(be)entirely different．

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You ________(be)ill if you drank that water．

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I wouldn't have been late if my watch ________(not be)slow．