Prawdopodobieństwo	Czasownik Modalny	Przykład
100% - absolutna pewność .	Użycie któregoś z czasów	It is expensive. It was expensive. It will be expensive. etc
99% - pewność oparta o logiczne wnioski.	Must Must have	Have to It must be expensive. It must have been expensive. It has to be expensive
50% - możliwe ale nie pewne	May May have	It may be expensive. It may have been expensive
50% - może być prawdziwe ale nie musi	. Need not/Needn't Needn't have	It need not be expensive. It needn't have been expensive.
30% - możliwe ale mało prawdopodobne	Might Might have	It might be expensive. It might have been expensive.
20% - jest to po prostu możliwe.	Can/Could Could have	It could be expensive. It can be expensive. It could have been expensive
0% - niemożliwe w oparciu o logiczne wnioski	Can't/Cannot Must not/Mustn't Can't have	It can't be expensive. It must not be expensive. It can't have been expensive
0% - absolutnie niemożliwe	Użycie któregoś z czasów w przeczeniu	It isn't expensive. It wasn't expensive. It won't be expensive.

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