-They usually play tennis every SaturdayDo the usually play tennis every Saturday?They don't usually play tennis every Saturday-She is watching TV nowIs she watching TV now?She isn't watching TV now-They have been living here since 1999Have they been living here since 1999?They haven't been living here since 1999-Sometimes I meet her near the schoolDo I sometimes meet her near the school?Sometimes I don't meet her near the school-She washes windows every monthDoes she wash windows every month?She doesn't wash windows every month-He seldom helps his mumDoes he seldom helps his mum?He doesn't seldom help his mum-He is driving a bicycle and singingIs he driving a bicycle and singing?He isn't driving a bicycle and singing-She is doing her homework at the momentIs she doing her homework at the moment?She isn't doing her homework at the moment-We have already watched this filmHave we already watched this film?We haven't watched this fim yet (Еще не посмотрели)-I have already opened the windowHave I alraedy opened the window?I haven't opened the window yet. (Еще не открыл)