肯定句变否定句及疑问句要变化的一些词1.some变为any。如:Therearesomebirdsinthetree.→Therearen'tanybirdsinthetree.但是,若在表示请邀请、请求的句子中,some可以不变。如:Wouldyoulikesomeorangejuice?与此相关的一些不定代词如something,somebody等也要进行相应变化。2.and变为or。如:Ihaveaknifeandaruler.→Idon'thaveaknifeoraruler.3.alotof(=lotsof)变为many或much。如:Theyhavealotoffriends.(可数名词)→Theydon'thavemanyfriends.Thereislotsoforangeinthebottle.(不可数名词)→Thereisn'tmuchorangeinthebottle.4.already变为yet。如:Ihavebeentherealready.→Ihaven'tbeenthereyet.