CUANDO TE VAS A LA PLAYA NO PUEDES TOMAR UN "BATH"
This issue came up in one of my classes the other day, and I am sure I have heard it before so I thought I would share it with you.
One of my students was explaining that she had gone to the beach for her holiday but that it was too cold to have a "bath". The idea of a "bath" is incorrect in this case because you can only have "a bath" in your house when you are in the bathroom, and you are sitting in the bathtub, and you are cleaning yourself. That is "a bath".
If you are on the beach, then you need to say something like: "I going for a swim." or "I am going for a dip" (advanced).
Hope that helps!
Soy el director de Daniel Smith + Partners. Tengo más de 15 años de experiencia enseñando inglés a españoles.