si compras entradas irás al cine
1.- If you buy ticktes you will go to the cinema
2.- If you bought tickets you would go to the cinema
3.- If you had bought tickets you would have gone to the cinema
no viajaré si vienes
1.- I will not travel if you come
2.- I would not travel if you came
3.- I would not have travelled if you had come
si hablas no aprenderás
1.- If you speak you will not learn
2.- If you spoke you would not learn
3.- If you had spoken you would not have learnt