Just to clarify я втомилася is what females say. Males say я втомився.
Why "I have tired" does not pass?
"To tire" is to make someone else tired. If someone is tired (in a state of being tired) themselves, you use the auxiliary verb "to be". The full sentence becomes "I am tired", where " tired" is an adjective.
'I have tired' is wrong
'To tire' can be used with or without an object. Technically, 'I have tired' is correct (i.e. I have become fatigued). But people much more commonly use the adjective: I have become tired.
would this also translate as "I was tired"?
I was tired - я був/була втомлен-ий/а
I think that it is a past tense because I saw в. but it turns out to be not. How come?