she added, pointing her wand at the misshapen canvas, which in one fluid motion rose into the air and settled, fully constructed, onto the ground before Harry, out of whose startled hands a tent peg soared,to land with a final thud at the end of a guy rope.

参考译文：她用魔杖指着那扭曲变形的的帆布补充说道。那堆东西以流畅的动立刻升到空中，并固定完全成型一下子便全部恰好落在哈利面前的地上，最后一枚钉子从受到惊吓的哈利手中飞起，噗地钉入到绳子的末端。

(1)before Harry做定语修饰前面名词the ground

(2)out of whose staerted hands..为非限制性定语从句修饰Harry

(3)which in one fluid motion..为非限制性定语从句修饰canvas

(4)to land with a final thud 作结果状语。

上面的句子来自下面一段话

“Apparently he didn’t want it back, his lumbago’s so bad,” said Hermione, now performing complicated figure-of-eight movements with her wand. “so Ron’s dad said I could borrow it. Erecto!” 

she added, pointing her wand at the misshapen canvas, which in one fluid motion rose into the air and settled, fully constructed, onto the ground before Harry, out of whose startled hands a tent peg soared, to land with a final thud at the end of a guy rope. 

“Cave Inimicum,” Hermione finished with a skyward flourish. “That’s as much as I can do. At the very least, we should know they’re coming; I can’t guarantee it will keep

请问老师：

这个顺序调整的对不对？

before a tent peg soared out of Harry whose startled hands to land with a final thud at the end of a guy rope.

你的理解不正确
（主语a tent peg） +（谓语soared ）+（状语 out of whose startled hands）+（状语 to land with a final thud at the end of a guy rope.）