i am writing - пишу сейчас -present continuous
I've been writing for 30 minutes - present perfect progressive
I write beautifully - present simple
я написал письмо вчера - I wrote a letter yesterday- past simple
i am writing - пишу сейчас -present continuous
I've been writing for 30 minutes - present perfect progressive
I write beautifully - present simple
я написал письмо вчера - I wrote a letter yesterday- past simple