UMIEJĘTNOŚĆ (LUB JEJ BRAK)

can / be able to (teraźniejszość)

could / was able to (przeszłość)

 

RADA / REKOMENDACJA

must / should / ought to

 

KONIECZNOŚĆ / BRAK KONIECZNOŚCI

have to / need to 

don't have to / don't need to / needn't

 

ZOBOWIĄZANIE

must / have to (teraźniejszość)

had to (przeszłość)

 

PROPOZYCJA

shall / call

 

PERMISSION (pozwolenie)

can / could / may / be allowed to

 

MOŻLIWOŚĆ

could / may / might

 

ZAKAZ

mustn't / can't 

 

PROŚBA

can / could / would

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(przykład)

You mustn't access social media on library computers.

You have to wear earphones when you use sound on a computer. 

You should log out of your email account after using a computer. 

You can use a computer for up to two hours. 

Out IT department might check users' internet activity.