YOU SAID:

did you realize that my neck can fold forwards and back

INTO JAPANESE

あなたは私の首が前方と後ろに折り畳むことができることに気づきましたか?

BACK INTO ENGLISH

Have you noticed that my neck can be folded forward and backward?

INTO JAPANESE

私の首が前後に折り畳まれるのに気づきましたか?

BACK INTO ENGLISH

Have you noticed my neck folded back and forth?

INTO JAPANESE

私の首が前後に折り畳まれているのに気づきましたか?

BACK INTO ENGLISH

Have you noticed my neck folded back and forth?