I know you had many ideas,but you need not trouble D---them.

不是need doing sth吗
Answer:
此题涉及到"need" 双重用法
(1)作情态动词:“需要”,后面跟动词原形.
(用在否定句和疑问句中)
(2)作实义动词:某人＋need＋to do
某物＋need＋doing
He needs to eat something.
This watch needs repairing
LZ所例句子"need"做的是情态动词,而真正的动词是"trouble",它后面要接不定式
如:Don't trouble to do it.
If you still feel confused,leave a message please
祝 学习进步!