Когда в английском ставиться в предложении you are а когда просто you ??? объясните ​

you are в презент континиус, you просто как подлежащее

you-ты когда ты говоришь кому-то , и ты говоришь you мокбы пом

Yesterday my mum, dad and i _went__ ( to go) to covent garden.while my parents _were to shop), i _was watching__ ( to watch) the street actors' performance. the performance was great! the pantomime actors and the jugglers _were   entertaining__ ( to entertain) the people around for two hours. while one man in a bright cap _was playing__ ( play) the violine, the juggler _was juggling__ ( to juggle) six big balls and the pantomime actor __was standing__ ( to stand) like a statue. the people _were laughing__ ( laugh) while the clowns _were ( to do) silly things. when my parents __arrived__ ( to arrive), one of the actors _was showing__ ( to show) tricks. we __left_ ( to leave) the performance while the people around _were singing__ ( to sing) together with the street actors.