I think your explanation around 0:15min is wrong or at least confusing. In fact the, the present perfect tense is used to talk about somenthing that began in the past, it's still occouring now and will have be completed by a point in the future. For example, I started work in a company in January 2000. Today is June 2022. So, I can say that By the end of this year (2022), I will have been working in the company for 2 years.
I admit that my graphic is a bit confusing. As long as the later point in time is located in the future, it doesn't matter if the earlier point in time is located in the past, present, or the future. However, my graphic may mislead people into thinking that the two points in time must all be in the future. Thank you for pointing it out.
![present perfect tense explained: have/has+P.P [learn basic English grammar]](http://i.ytimg.com/vi/kwusJT_tAi0/mqdefault.jpg)
![present perfect tense explained: have/has+P.P [learn basic English grammar]](/img/tr.png)
![future continuous/progressive tense explained: will be V-ing [learn basic English grammar]](http://i.ytimg.com/vi/bBiRf4ItsZU/mqdefault.jpg)
![present perfect continuous/progressive tense explained [learn basic English grammar]](http://i.ytimg.com/vi/FNVuQxg1ZUs/mqdefault.jpg)
![simple future tense explained: will+V, present tense+future time, etc [basic English grammar lesson]](/img/1.gif)
I think your explanation around 0:15min is wrong or at least confusing. In fact the, the present perfect tense is used to talk about somenthing that began in the past, it's still occouring now and will have be completed by a point in the future.
For example, I started work in a company in January 2000. Today is June 2022. So, I can say that
By the end of this year (2022), I will have been working in the company for 2 years.
I admit that my graphic is a bit confusing. As long as the later point in time is located in the future, it doesn't matter if the earlier point in time is located in the past, present, or the future. However, my graphic may mislead people into thinking that the two points in time must all be in the future. Thank you for pointing it out.