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keep, lend borrow, lend lend ,borrow have ,borrow
borrow; lend keep; lend lend; borrow keep; borrow
provided that so that in order that in case
mustn’t，may mustn’t，must needn’t，can needn’t，must
mustn’t can’t needn’t may not
borrow; lend keep; lend lend; borrow keep; borrow
can't mustn't needn't may not
No, you can’t of course No, you may Sorry, you can’t Yes, certainly not
unless so long as long so long as
can’t mustn’t needn’t may not
mustn’t needn’t can’t may not
can’t mustn’t needn’t may not
even though even if so long as so that
may not mustn’t needn’t shouldn’t
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