Have you ever had doubts whether or not to put the crasis in demonstrative pronouns? The problem is that this crasis is not the pronoun, but the representation of the junction of the preposition that precedes it and its initial “a”!
Thus, there will be the grave accent when what was said above requires the preposition “a”. Look:
I mean someone.
I mean that woman.
I mean that woman.
Now look: I mean that woman who has come in now or I mean the one who has come in now.
It will be even clearer if you replace the pronoun with one that doesn't start with “a”:
I don't mean that one that happened yesterday. I mean To this what happened now.
Don't be afraid to put the backquote before “that”, as it is a masculine term, because what is taken into account is the “a” at the beginning.
This notebook is just like the one we saw yesterday.
Now see more precisely: You will receive your bonus when it happens that one of free minutes.
You will receive your bonus when it succeeds. to this free minutes plan.
The crasis can also occur with the relative pronouns to which, which:
The celebrations I attended were much shorter.
It can still occur with "at what", in order to avoid unnecessary repetitions:
Bought a similar cover the Cape)what it had spoiled in the last rain.
By Sabrina Vilarinho
Graduated in Letters
Source: Brazil School - https://brasilescola.uol.com.br/gramatica/a-crase-os-pronomes-demonstrativos-aquele-aquela-aquilo.htm
