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Grammar: Present perfect vs Past simple Usage: An action began in the past now. Ex: I have learn English for 3 years. An action that happened in the past at an unspecific time. Ex: They have lost my key. An action has just happened. Ex: He has just gone out Usage: An action that happened and ended at a specific time in the past. Ex: She learned English 3 years ago. An action that happened over a period but ended in the past. Ex: We skated for 15 years but now we stop. Tell a story Ex: One upon a time, there was a beautiful princess,…. Form Present Perfect S + have/has + Ved/Vc3 + O S + have/has – not + Ved/Vc3 + O Have/has + S + Ved/Vc3 + O? Simple past S+ Ved/VC2 + O S + didn’t + V + O. Did + S + V + O? Time expression Since, for, Already, yet, Ever, never, Several times, For ages, For a while, ago, last…, in 1991 When I was young. Present perfect vs Present perfect continuous P.P emphasizes on result P.P.C emphasizes on the continuity of time, duration of time. Both are used to describe an action that happened in the past now. Form Present Perfect S + have/has + Ved/Vc3 + O S + have/has – not + Ved/Vc3 + O Have/has + S + Ved/Vc3 + O? Time expression: many times, several times, Present Perfect S + have/has + been _ Ving + O S + have/has – not + been – Ving + O Have/has + S + been _ Ving + O? Time expression: “all day”, “for ages” Past continuous Usage: An action that happened at a point of time in the past: I was teaching at this time yesterday. An interrupted action When he was watering the garden, it rained. Form: S + was/were + V-ing + O S + was/were _ not + V-ing + O Were/was + S + V-ing + O? Time expression: ago, last, yesterday, in 1992, ….(when, while) Past perfect An action that had happened before another action that happened in the past. She had left before I came. After I had had breakfast, I went to class. After the teacher entered class, students stood up to say hello. About Future Simple present Events schedule or timetable (to be, open, close, begin, start, end, finish, arrive, come, leave, return,…) The train leaves Sydney at 9.00 tomorrow. Present continuous A definite plan or an arrangement. Mark is taking his CEA exam next week. Be going to When the speaker already has an intention or plan We’re going to paint the house. When making a prediction with evidence She’s a good student. She is learning hard. She’s going to pass the exam. Will When the speaker decide to do sth. at the time of speaking Perhaps, I’ll paint the house. When making a prediction without evidence You’ll pass the exam. Don’t worry. . Past simple Usage: An action began in the past now. Ex: I have learn English for 3 years. An action that happened in the past at an unspecific. action that happened and ended at a specific time in the past. Ex: She learned English 3 years ago. An action that happened over a period but ended in the