verb
1
BAD : All their products are suppose to be guaranteed for six months.
GOOD : All their products are supposed to be guaranteed for six months.
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be supposed to be/do sth (WITH -d ): 'How many pages are we supposed to write?' 'You're supposed to be there in five minutes.'
2
BAD : It's a very unusual coat and so I suppose you will not have any trouble finding it.
GOOD : It's a very unusual coat and so I don't suppose you will have any trouble finding it.
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See note at THINK 6 (↑ think )