同学你好，该知识点来自沪江网校《BEC商务英语中、高级连读【全额奖学金签约班】》的课程，想要更系统的学习，欢迎进入课程学习。不仅可以和更多的同学一起学习，而且还有老师、助教随时的学习指导和知识点解答哦。

同学好，
这两种都是可以的，只是need在其中表示的词性有所不同
第一句里面need作动词：意为需要；必需， 英文释义为：to require sth/sb because they are essential or very important, not just because you would like to have them
如：Do you need any help? 你需要帮忙吗？
第二句中need作名词词性，表示需要；必须，英文释义为：a situation when sth. is necessary or must be done
如：There is an urgent need for qualified teachers. 迫切需要合格教师。
祝学习愉快~