It is because "who" (an interrogative word) is an object of a verb (or preposition). "who that man is" is an indirect question. " So, if an interrogative pronoun is the object of a verb or preposition, the indirect question's subject (bold) will come before the verb (underlined): Indirect: I know who she is .
New words, one handy idiom, and a 2-minute quiz — delivered to your inbox to keep your streak alive.
egerol1I don't understand why we can't say: I don't know who is that man?It's just the way we say it in English.
egerol1hello I want to get help to not confuse these phrases:
Let's say that I saw a man and I don't know that man
I must say that: (i) "I don't know who that man is"
but I don't understand why we can't say: (ii) I don't know who is that man?
I mean why "the man" and "is" are inverse?