Relacionar Columnas RULES!!Versión en línea modal verbs for rules por Ilaria Tabet 1 They know they must keep their park clean. 2 There are signs everywhere saying that teenagers can't ride skateboards or bikes. 3 We don't have to wear a uniform at school, thank God! 4 Everyone can enjoy the park. 5 You can get up later today... it's Sunday! 6 You mustn't be late for the test! 7 You don't have to pay to use the park...it's free! 8 They know they mustn't leave rubbish in the park. prohibition it's not necessary it's not necessary prohibition obligation it is allowed/possible it is allowed it is not allowed