I assume that I could have written: "I write the letter" as well.
EN-UA and UA-EN developers translate "the" as "цей" (this). Writing a letter you assume that it is some letter, not a peculiar one
What is the infinitive form of this verb? пишити?
Дякую! So it's one of the irregular verbs, isn't it?
It's not considered irregular as takes usual conjugation endings. There are 3 irregular verbs in Ukrainian: дати, їсти, вісти (+ derivatives). All the other follow one of 2 possible conjugation patterns.
But there can be some altering consonants
How вісти is translated? Is it not вести?
Like Polish one:
писати - pisać
пишу - piszę
Я пишу листа. - так буде правильно.
Agree. The presented answer is wrong
Why? Лист is not animate