This lesson is about subject in English grammar and it has been described as the basic unit to start a sentence with. The importance of subject has been described at length. Moreover number of things have been described about subject. The placement of the subject in affirmative sentence. The placement of subject in the negative sentence. the placement of the subject in interrogative and negative interrogative sentence. the main emphasis is given to the importance of the subject. and the noun and a pronoun can be used as a subject in the sentence is also explained.