Doesn't "att" fit between börjar and bli?
Yes, you can write it with att in there and that's just as perfectly fine a sentence. However, it is often omitted, especially in less formal contexts.
Why is "Pojken börjar vara trött" not accepted?
I have the same question.
What would be the difference between saying "Pojken börjar bli trött" and "Pojken blir trött"?
Pojken börjar bli trött = The boy is starting to get tired
Pojken blir trött = The boy is getting tired
In a multiple choice I choose "Pojken börjar att bli trött" and Duo said it is wrong. According to @Emil with "att" is a fine sentence. Should I report it?
I put "Pojken börjar tröttna." Is that incorrect?
Tröttna does not mean to get tired as in wanting to sleep. It means getting fed up with something.
Kan man säger:
Pojken börjar få trött?
No, that doesn't work. It sounds like if you'd use 'receive' in English.
"The boy begins to become tired" works too.
I wrote "pojken är att börja trött." I got this wrong. Why?
Why can't 'pöjken borjar känna trött' be accepted?