Ответ:

1) a – has been staying (‘has stayed’ is possible), b – have stayed; 2 a –have/has moved, b – have been moving (‘have moved’ is possible); 3 a – have been stopping (‘have stopped’ is possible), b – has stopped; 4 a – haven’t read, b –  have been reading (‘have read’ is possible); 5 a – has been giving (‘has given’ is possible), b – has given; 6 a – haven’t swum, b – have been swimming; 7 a  – have been putting (‘have put’ is possible), b – has/have put; 8 a – has disappeared, b – have been disappearing (‘have disappeared’ is possible).