should / ought to - to say that something is a good idea., shouldn't - to say something is a bad idea., have to - to say that something is necessary., don't have to - to say that something is not necessary., mustn't - to say it is very important not to do something. ,

Tabla de clasificación

Estilo visual

Opciones

Cambiar plantilla

¿Restaurar actividad almacenada automáticamente: ?