keep at	be continue working at, kontynuować robienie czegos
keep up with	– be informed about, być nabieżąco
keep up with	stay at an equal level with, nadążać za
keep up (with)	progress at the same rate, kontynuować, utrzymywać
keep to	follow, trzymać się, przestrzegać
keep on at	continue talking in an irritating way, nudzić, nie dawać spokoju,
keep down	repress, tłumić
keep in with sb	continue to be friendly, utrzymywać dobre stosunki
keep back	hide, ukrywać
be kept in	detain after normal hours as a punishment
keep on	continue doing sth, kontynuować
keep in	detain after hours as a punishment