"Kawarinai" is not exactly a proper grammatical verb change in Japanese. I believe that you are thinking of 変わらない (kawaranai) which means, "no change". So in this case 変わらないです (kawaranai desu) is saying "Nothing's changed".
You may say '[noun] ga (amari) suki ja nai desu.' ("I don't like [noun] (very much).")
simply, Desu. eg. who are you? - anata wa dare desu ka? where are you? - anata wa doko desu ka? are you ill? - anata wa byouki desu ka? are they new? - arera wa atarashii desu ka? ect. Desu means: Are, Is, and am.
"Toire wa doko desu ka?" is a Japanese phrase and in English it means "Where is the bathroom? Where is the toilet?"
"O-ai dekite ureshii desu" is a Japanese phrase and in English it means "Nice to meet you"
Kanojo ga suki desu - I like her. Kanojo ga daisuki desu - I really like (love) her.
In spoken and rather informal speech you can say 'Nanka kawatta koto nai?' or 'Nanka kawari WA nai?'.
"Nai" in Greek means "Yes" in English
'Boku ha amerikajin de ha nai desu.'
Casually: 分からない (wakara nai) Politely: 分からないです (wakara nai desu) Extra politely: 分かりません (wakari masen)
The sentence is wrong both grammar-wise and meaning-wise. We have three different things here, 'ja nai' , 'de WA arimasen' and 'desu'. "Ja nai" is casual speaking for 'am/is/are not', its polite and formal counterpart is 'de WA arimasen', again meaning the same; So one of them is enough and which to use indicates the level of formality in the sentence. 'Desu' is polite for 'am/is/are' and is not needed here. The sentence in correct form would be:[ Watashi no nihongo (WA) sugoi ja nai ]or[ Watashi no nihongo WA sugoi de WA arimasen ]Meaning: My Japanese is not impressive/great.
vagina
"Totemo yokatta desu" or "sugokatta desu."
You may say '[noun] ga (amari) suki ja nai desu.' ("I don't like [noun] (very much).")
simply, Desu. eg. who are you? - anata wa dare desu ka? where are you? - anata wa doko desu ka? are you ill? - anata wa byouki desu ka? are they new? - arera wa atarashii desu ka? ect. Desu means: Are, Is, and am.
tanoshikatta desu
kare wo suki desu or you can drop the desu if familiar
Soup umare kawari no monogatari - 2012 is rated/received certificates of: Japan:G