 are you today? This is Marc. I'm doing great. Thanks for asking. I've been an English teacher since 1996. I've noticed you're interested in the English language. Your English has improved so far. Have you ever visited Canada? My students have always hated the present perfect tense. In this lesson we're going to look at the present perfect tense, present perfect simple. So stay tuned. Finally, the present perfect simple. Some students confuse it with the past or with the present. The present perfect simple can be both a past and a present and I always say that the present perfect simple is it belongs to us. It's a tense that is alive, very much alive and we use the auxiliary to have or has in the third person singular. So I drew a timeline just to show you graphically how we use the present perfect simple. Present perfect simple, an action that started sometime in the past is not important when and it continues up to now. So the when is not important, the action however it is. And here I wrote an action that started sometime in the past and may continue until the very moment of speaking. I'm going to show you this with different rules and different key words to help you understand when to use the present perfect simple. So let's go to the formulas now, the three types of sentences. For a positive sentence we need the subject plus the auxiliary so have or has plus the past participle. It could be regular or irregular. If you want to watch a lesson on regular or irregular verbs you may click here and then we need the object. So an example he has visited Canada so he has visited Canada right there. Okay the negative sentence is with the subject then we need the auxiliary plus not so have or has plus not then the past participle and then the object. They haven't studied for the exam. They haven't studied for the exam so the action is important not when. For a question then WH question word plus auxiliary plus subject plus the past participle plus the time expression for example. Have you ever been to a zoo in your town? Have you ever been to a zoo in your town? We have adverbs and time expressions that we basically know we need to use them with the present perfect simple. These are sins and for that we could also use it with the past simple but also with the present perfect simple. Just already and yet we all use them with the present perfect simple still ever never always only this this month this year this week etc so far etc. Now the most important thing when to use these terms well the first the first and the most important is to describe life experiences. I've been an English teacher since 1996 so I've been an English teacher since 1996. Am I an English teacher now? Yes I am so this is something that belongs to my life. I've been an English teacher and here I gave you an indication of a time. I'm telling you that I'm an English teacher. I've been an English teacher since 1996. Now let's look at another example. He's worked at that office for 10 years. He's worked at that office for 10 years. Is he working at that office? Probably yes or probably not. We know that he has worked at that office for 10 years so here we're not interested exactly when he started working there but he has worked at that office that's all. So life experiences. The second point that we use the present perfect simple with no specific time when you don't indicate the time. So for example I've noticed you're interested in the English language. I've noticed this is what is important. I've noticed you you're interested in the English language so right there I've noticed is the most important part of the sentence. Now another example. They've seen you at the library. They've seen you at the library. Here it's important that they've seen you at the library not when obviously we're not concentrated on the on the time but on the action itself. Number three change over time. So when you want to specify a change your English has improved so far. So far your English has improved. Has gotten better for example. Another example. She has changed so much over the years. So when I first met her she was blonde then she became brown brown hair so a brunette. She has changed so much over the years. The fourth one is foreign complete actions. For example have you ever visited Canada? We normally use the adverb ever. When you want to ask if somebody did something or not have you ever visited Canada? What is important here if you visited or not so you're interested in the action. Another example. He's lost his keys. He has lost his keys. I can't find them. So that means that he's lost his keys sometime in the past. I'm not interested but I'm interested that he has lost his keys. The last way to use it is for accomplishments. For example Germany has won the World Cup this year. This year means that it's still going on right? We are in 2017 for example and Germany has won the World Cup this year. It's not true but we suppose that we just pretend that Germany has won the World Cup this year. Or another example. My students have always hated the present perfect simple. I hope after this lesson they don't hate it anymore. My students have always hated the present perfect simple. Well I thank you very much for watching. This was a very tough lesson. I hope you enjoyed it and if you have you may share it. If you have any questions or comments type them under this video. If you haven't subscribed to my channel I suggest you do. And if you want to type your own example of the present perfect simple you may do so under this video. Having said that thank you very much for watching and I see you next week with a new grammar lesson. Take care. Bye bye.