be good at singing

I sing well.

私は上手に歌います

I sing well in the practice room.

私は練習室で上手に歌います

I sing well to the accompaniment in the practice room.

私は練習室で伴奏に合わせて上手に歌います

I sing well to the accompaniment in the practice room today.

私は今日練習室で伴奏に合わせて上手に歌います

I sing well to the accompaniment in the practice room with my friend today.

私は友達と今日練習室で伴奏に合わせて上手に歌います