Position of the adverb

I have to join the conversation, for "really" is my favorite word. Really!

I do NOT say that my  opinion is correct.  But it satisfies me.

Tom: It is a good book.

Mona: How good?

Tom: Really good. (The adverb modifies "good.")

*****

Tom: It is a good book.

Mona: I don't believe you. Are you joking?

Tom: No, I am not. Really, it is a good book. / No, I am not. It is [,]really [,] a good book. / No, I am not. It is a good book, really! (The adverb modifies the whole sentence. It means something like "Believe me!")

Hi. Ahmed and the Parser,

@Ahmed.A.A posted:

Hi, which is correct:

a- ''It is a really good book.''

b- ''It is really a good book.''

This is just to clarify the Parser's answer, with which I agree. Both are correct. 'Really' works as an intensifier in 'a' meaning 'very'. In 'b', it is close in meaning to 'actually'. It may be used when you have a different impression (opinion) about that book. I don't think the usage of commas is necessary here.

Very interesting.

Thanks!

Thanks a lot Ahmed and the Parser.