English Grammar Mr. Pankaj teaches very well, isn't it?

व्याख्या:- isn't it? Is correctly written by doesn’t he. Is or is not (isn't) refers to a state of being, rather than an activity. If someone is pretty, young, friendly, etc., isn't is proper. If an activity, such as run, sing, talk, etc., is involved, the activity is done or it is something the person is doing and, as a result, doesn't is proper. Doesn't is an action verb (albeit a negative one).