He need not go.为什么need不加s?

He need not go.为什么need不加s? My watch need be repaired中My watch 是第三人称,为什么need不加s? there need to be这里的need为什么不加s He says he needs a book.say已经加s了,为什么need还要加s? plants need water为什么加s We need a small amount of fuel.amount是可数名词,为什么不加s there's no need for knives.为什么no不用not.为什么用need for.直接用need不行 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? need要不要加s You’ll find there’s no need to cry 为什么这里要加THERE'S 不要可以不 If he _____(need)help,he doesn't have to go far.空格中为什么填“need 2.Can you point to the clothes he needs?这句话中的need为什么要加s?