I found this video, which maybe some of you have seen already, very instrumental. Plus I created a sophisticated Mind Map of this phenomenon but oops! Nothing is perfect and my software is not any exception – something went wrong, so after about 2 hours of work I have only this picture (see down). That „sophisticated“ Mind Map will be some other day (note of the author-already ready to use:-) ) . But I have an excuse ;-) for not to do it again – I have swum 2 km in pool and now I need to go to the bed (take, please, into consideration that it is half past 1 a. m.) So, as you can see, the human mind can always find some „more or less relevant“ excuse for everything and to use the present perfect at the same time, at this time (is it correct?)
So, at least this way. Enjoy this instrumental video:
And here is the promissed Mind Map (note of the author - repaired next day):