adverb
DUBIOUS : Perhaps I will even decide to get married after all.
GOOD : I may even decide to get married after all.
DUBIOUS : Perhaps it will be a good chance for you to have a rest.
GOOD : It may be a good chance for you to have a rest.
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May/might usually sounds more natural than perhaps ... will : 'My mother may need to have an operation.' 'You might feel that the course is too difficult.'