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should know must know have known will know
What’s wrong Can I help you Do you know What should I do?
should, would could, did might, should should, had
If I know Should I know Had I known If I should have known
should be should should have did
should have spoken; would know spoke; would know had spoken; would have known had spoken; would know
Yes, I know about it Yes, I’m coming to that No, you needn’t know it No, you should study geography hard
should have known should know must know must have known
should, would could, did might, should should, had
should, would could, did might, should should, had
If I know Should I know Had I known If I should have known
How I know it As I know In my opinion I can see it
had she known Did she know If she know if she should know
A. you didn’t know our national hero to you not to know him you should know nothing about you knew nothing about him
had known would know should know knew
Yes, I know about it Yes, I’m coming to that No, you needn’t know it No, you should study geography hard
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