在姓氏复数形式前表示一家人或夫妻俩。?Greensareallattable.?(格林一家人)?Blacksarebothfriendly.(布莱格夫妻俩)IK在逢十的复数数词前表示某个年代。(七十年代)(九十年代)HewasinShanghaiin?1970sWewerebomin?1990s12。在乐器名词前Theboylikesplaying?uitarLilyisgoodatplaying?violin13o在某些专有名词前。IwanttogotoGreatWallandGreatLakesIlike?NewYorkTimesDoyouknow?RedSea?零冠词(不用冠词)的情况lo在专用名词、抽象名词、物质名词、复数可数名词前in?BeijingFrom?HongKong2o星期、节假口、月份、季节等名词前inMay3o球类、棋类、牌类体育活动以及三餐饭等名词前play?er?play?basketball4。语言名词、各门学科、某些疾病名称前learn?English5o头衔、呼唤语、单数可数名词表示家庭成员的称呼,以及在表语、补语或同位语中的职位名称前。?PresidentLincoln MrLi6.名词前有this/that/these/those,形容词性物主代词my/oui7youi7his/hei7its/their,不定代词some/any/one/every/neither/either等限定词吋bytrainbybikebybusbyplanebysubwaybyairbyboatbyship7•与by连用的交通工具名称前8.在一些固定搭配或习惯用语中in?danger?in?happinesson?foot?at?night?thatoldladylikesthose?cats.by?caby?waterin?troubleat?noon.
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