PRESENT PERFECT and PAST SIMPLE - what’s the difference in English?

What is the difference between the past simple tense and the present perfect tense in English? Watch my video to find out! There are some practice exercises at the end so keep watching!

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[idabagusdarmaputra]

Thank a lot Augnieszka for your useful teaching...I've sent your nice video to my kids ..I sent it few minutes ago..again thank you very much

[mmustal]

Am stuck this vid, thanks for such wonderful voice.

[brahimsebbata]

Thank you ...ils a good english...fine explications

[Sangeeta_Vyas_study]

Hello. Aga, I am from India today I have just watched your video.
it is amazing.

[vaiyapurivs]

It's simple and understanding easily

[marimuthuelakkuvan]

❤ i too like to visit london in future

[mohamedosman-qzln]

Hello Gaga I like your videos thank you

[ayishamohamed]

Hi Mam..I am from India..your videos are very useful..

[iugokfv]

Kindly am requesting for a grammar book.

[waheedqayumi]

Hello Gaga
If I say I have been living in what is the difference between living and

[debughosh]

I lost my pen two days ago.
Through that sentence, it is clear that two days age my pen was lost, but right now have I found it or not that is not clear from that .
But, if I write,
I have lost my pen. It is not clear from that sentence when did it lose.
But it is clear that it was lost before the moment of speaking and till now it is not found.
Is it wrong or righ?
Mam, please make me understand.

[ansetiadi]

I have eaten your sandwich, so you don't have it anymore 😀

[adam_meek]

it's I /ET/ a sandwij.
not /eit/. PLEASE LEARN CORRECT ORTHOEPY.

AND why I 'what did you just say' correct but 'what hav u just sed' rong?