Use of Is / Am / Are [Present tense]

• Is: He/She/It and
  Singular Noun [Subject]
• Am: I
• Are: We/You/They and Plural Noun [Subject]
• Is/Am/Are should be used with Verb + ing for action

Examples

• I am trying to solve the issue. [action]
• He is waiting for you. [action]
• You are going to Lagos. [action]
• You are very happy. [state]
• I am a doctor. [state]
• He is a learner. [state]

Use of Was / Were [Past Tense]

• Was: He/She/It/I and Singular Subject
• Were: We/You/They and Plural Subject
• Was/Were should be used with Verb + ing for action

Examples

• She was reading a newspaper. [action]
• They were crossing the river. [action]
• You were reading a book. [action]
• Harry Potter was a learner at Hogwarts. [state]
• They were amazing football players. [state]
• She was a reputed novelist of her time. [state]

Use of Has / Have / Had

• Has: He/She/It and Singular Subject [Present tense]
• Have: I/We/You/They and Plural Subject [Present tense]
• Had: Is used with any subject, Singular or Plural

Examples

• He has lost the money.
• I have lost my money.
• I had lost my money.