视频中的蝴蝶逐渐变成了一朵花，特效非常逼真。

The butterfly in the video slowly ___morphed into a flower with realistic effects.

随着时间推移，他对音乐的兴趣逐渐转变为对创作的热情。

His interest in music gradually ___morphed into a passion for composition.

视频特效将小猫逐渐变形为一只老虎。

The video effects gradually ___morphed the kitten into a tiger.