严格来说,第二句应该有错误!need的用法是1.实意动词。need sth need to do sth (主语为人) need doing sth(主语为物,表达一种被动含义)eg. She needs to pay 30 dollars for the dress.2.情态动词。后跟动词原形,无人称与时态的变化。eg.She need pay 30 dolars for the dress.