YOU SAID:

he is laughing and walking at the same time with her while singing in a blue shirt

INTO JAPANESE

彼は青いシャツを着て歌いながら彼女と一緒に笑って歩いている

BACK INTO ENGLISH

He is in a blue shirt singing and laughing and walking with her

INTO JAPANESE

彼は青いシャツを着て歌い、笑い、彼女と一緒に歩いています

BACK INTO ENGLISH

He is wearing a blue shirt, singing, laughing and walking with her

INTO JAPANESE

彼は青いシャツを着て、歌って、笑って、彼女と歩いています

BACK INTO ENGLISH

He's in a blue shirt, singing, laughing, walking with her

INTO JAPANESE

彼は青いシャツを着て、歌って、笑って、彼女と一緒に歩いています

BACK INTO ENGLISH

He wears a blue shirt, sings, laughs, walks with her

INTO JAPANESE

彼は青いシャツを着て、歌って、笑って、彼女と一緒に歩きます

BACK INTO ENGLISH

He wears a blue shirt, sings, laughs and walks with her

INTO JAPANESE

彼は青いシャツを着て、歌って、笑って、彼女と一緒に歩きます

BACK INTO ENGLISH

He wears a blue shirt, sings, laughs and walks with her