I want Tell you something
I've learnt recently <<present perfect
^__^
I wrote on my door
open it slowly
and my brother who's Teaching english for Ten Years before he got retired
Told me that my sentence is Totally incorrect
I asked him why<<<past simple
He told me that I must write it like this way
Open slowly
I must not to write it
Cuz it reference TO pronoun
Certainly he's right
What do you think Guys
who's=who has
he's =he is