Point 1: Use the present perfect to talk about experiences.
- Where have you worked?
- Ive worked for many companies
- I havent worked for him.
- Have you been to Europe?
- Yes, I have been to Spain.
- No, I havent had the time or money.
Point 2: Use the particle 'yet' in questions to ask if an action occured.
- Have you seen the movie yet?
- Yes, I have seen it.
- No, I have not seen it yet.
- Have you finished yet?
- Yes, I am done.
- Not yet.
Point 3: Use 'already' in affirmative statements. It can go before or after the verb. Also, the answer can use the past tense.
- Have you eaten yet?
- Yes, I've eaten already.
- Yes, I've already eaten.
- Have you called her?
- Yes, I called her already.
- Yes, I already called her.
Point 4: Contractions
- I have eaten. = Ive eaten.
- I have not eaten. = I haven't eaten yet.
- You have won. = Youve won.
- You have not won yet. = You haven't won yet.
- She has left. = Shes left.
- She has not left yet. = She hasn't left yet.
- He has finished = Hes finished.
- He has not finished yet. = He hasn't finished yet.
- It has stopped. = Its stopped.
- It has not stopped yet. = It hasn't stopped yet.
- They have quit. = Theyve quit.
- They have not quit yet. = They haven't quit yet.
- We have won. = Weve won.
- We have not won yet. = We haven't won yet.