she needs a necklace.need为什要s?

she needs a necklace.need为什要s? she needs study .need加S吗? she ___see a dentist A needs to B need to C needs D needed She ___a new watch. A needs to buy.B needs buying. C need bu i don't think she ( ) so much exercise a.need b.needs c.need She ( ) ang help.A.does not need to B.need not C.needs not . she need to see a doctor 这里是用need应用needs She is wearing a s___ necklace.要求所填单词为6个字母. need作动词 必须时 有没有第三人称单复数needs 如She needs a coat Sh She looks tired and ___ have a rest. A. need to B. needs to He says he needs a book.say已经加s了,为什么need还要加s? She is wearing a s____ necklace 意思呀.