I thank you a lot for all the wonderful comments, that helped a lot to complement all the posts. Thanks a lot.
Well, today I am gonna talk about BATH and BATHE.
In British English, the verb BATH is used to mean “wash onself in a bath tub”
E.g. Children should bath regularly.
The verb BATH is not used in American English. Instead, the expressions “have a bath” or “take a bath” is used.
E.g. As I was feeling hot, I took a bath.
In British English, BATHE means to “swim for pleasure”. It is very formal. In an informal style, we use “have a swim” or “go for a swim”.
E.g. He said, he had a good bathe.
In American English, bathe is used to mean “take a bath“.
E.g. I always bathe before I go to bed. (= I always take a bath before I go to bed.)
Note that to lie in the sun is to sunbathe.
P.S. In this homepage you can download this grammar (Perfect your Sentences).