
A pronoun is a word that replaces a noun or a noun phrase in a sentence. The most commonly used pronouns are called personal pronouns. A personal pronoun refers to a person or thing.
What is the difference between simple past tense and present perfect tense? When do we use the simple past tense? When do we use the present perfect tense? When we have to give the details of an achievement, an experience or a completed action, what tense do we use?