YOU SAID:
She was going to be wery happy
INTO JAPANESE
彼女は幸せになりそうでした
BACK INTO ENGLISH
She was going to be happy
INTO JAPANESE
彼女は幸せになるだろう
BACK INTO ENGLISH
She will be happy
INTO JAPANESE
彼女は幸せになります
BACK INTO ENGLISH
She will be happy
Come on, you can do better than that.