Vamos a limpiar la casa y, si tenemos tiempo, iremos a dar un paseo por el parque.We're going to clean the house, and if we have time, we'll go for a walk in the park.
Si tenemos hora con el abogado a las cinco, mejor que salgamos ahora o llegaremos tarde.If we have an appointment with our lawyer at five, we'd better leave now or we'll be late.