Progression 1 - used to p.7 Abrir video Progression 2 - past participles p.11 Abrir video Progression 3 - obligations & prohibitions - must/have to p.15 Abrir video Progression 3 - obligations & prohibitions - quiz p.15 Abrir video Progression 4 - recommendations - should/ought to p.19 Abrir video Progression 5 - requests & offers - would p.23 Abrir video Progression 6 - future - will p.35 Abrir video Progression 7 - present simple (facts & habits) p.39 Abrir video Progression 8 - zero conditional p.43 Abrir video Progression 9 - first conditional p.47 Abrir video Progression 10 - present perfect: just/already/yet p.51 Abrir video Progression 10 - present perfect: ever/never p.51 Abrir video Progression 11 - present perfect vs past simple p.55 Abrir video Progression 11 - present perfect vs past simple (2) p.55 Abrir video Progression 12 - second conditional p.67 Abrir video Progression 13 - demonstratives p.71 Abrir video Progression 14 - passive vs active voice p.75 Abrir video Progression 15 - for / since p.79 Abrir video Progression 15 - while / during p.79 Abrir video Progression 15 - during p.79 Abrir video Progression 16 - present perfect / past simple p.83 Abrir video Progression 16 - present perfect / past simple (2) p.83 Abrir video Progression 16 - past continuous / past simple p.83 Abrir video