she needs study .need加S吗?

she needs study .need加S吗? 情态动词有时态么she needs obey the school rules.这句话对么.need可以加s吗 she needs a necklace.need为什要s? I don't think he needs help 问一下need为什么加s don't后不是加原形吗? He says he needs a book.say已经加s了,为什么need还要加s? she need a notebook and a pen.这个need需要加s吗? she often helps people who need help.need需要加s吗? the boy needs ball pen为什么need要加s呢? Who needs a cup of tea?中need为啥加s The school needs help to teach music need为什么加s. 2.Can you point to the clothes he needs?这句话中的need为什么要加s? She needs our help I need to think about it