第页8BUnit2WaterP151.◆usev.使用usesth.todo=usesth.fordoing用某物来做某事beusedtodo=beusedfordoing被用来做某事beusedtodoing习惯于做某事usedtodosth.=oftendidsth.过去常常做某事◆usefula.有用的beusefulto…对……有用◆uselessa.无用的P161.◆valuablea.有价值的；宝贵的=precious---morevaluable---mostvaluable◆valuen.价值2.◆goldn.黄金；金子goldcoin金币goldfish金鱼◆goldena.金（黄）色的；美好的goldenages黄金时代3.◆litren.升twolitresofwater二升水◆millilitren.毫升4.dayn.--dailya.每天的；=everydayadv.每天=everyday5.◆exercisev.锻炼exerciseregularly有规律地锻炼◆exercisen.1)exercise泛指“锻炼”时，做不可数名词，如：takeexercise锻炼身体takemoreexercise多锻炼2)exercise表示“体操”或“练习（题）”时是可数名词，要用复数形式。如：domorningexercises做早操，doeyeexercises做眼保健操doEnglishexercises做英语练习6.amountn.量；数量theamountofwater水的数量◆ahugeamountof或hugeamountsof+不可数名词：大量的……◆alargenumberof+可数名词：大量的……7.increasev.增加；增多---decreasev.减少；减小increaseby50增加了508.remainv.保持；留下=keep9.freezev.使结冰---froze---frozen◆frozena.冷藏的；结冰的；惊呆的frozenground结冰的地面frozenfood冷冻食品◆freezinga.严寒的；极冷的infreezingweather在极冷的天气里10.becomev.---became---become变得+adj.becomehappybecomeevenhappier11.liquidn.液体solidn.固体gasn.气体harmfulgases有害的气体12.ahalf或onehalf二分之一aquarter四分之一one-third三分之一two-thirds13.coverv.覆盖；涉及n.封面◆becoveredwithv.被……覆盖becoveredwithsnow14.◆chemicala.化学的achemicalchange一个化学变化n.化学物质；化学品manychemicals许多化学品produceachemical产生一种~◆chemistryn.化学begoodatchemistry擅长化学achemistrybook/teacher/lesson◆chemistn.药剂师；化学家15.symboln.=mark;sign符号；象征；标志thechemicalsymbolforwater水的化学符号16.put…inthecorrectorderv.把……按正确的顺序排列17.flowv.--flowed--flowed流；流动flowintothesea流入大海streamn.小溪18.risevi.–rose–risen(不及物动词，后面不可以跟名词。后面跟名词的用及物动词：raise)rise=goup上升=standup起立=getup起床19.raisev.–raised–raised提高；升高；养育；筹集raisemoneyfortheSPCA为爱护动物协会筹钱raiseyourhand举起你的手=putupyourhandraiseyourvoice提高你的声音20.fallv.--fell--fallen跌倒；落下n.秋天fallasleep入睡21.feelv.--felt--felt感觉feelsleepy感到困22.cloudn.云—cloudspl.---cloudyadj.多云的；阴天的23.talktome/him=talkwithme/him跟我/他谈话24.对表示天气的形容词划线用：What’stheweatherlike?或Howistheweather?提问。P171.Daisy黛西(女名)daisyn.雏菊2.brush(one’s)teethv.刷牙---brushesbrushher