6、h2.on—off3.full—fill4.knife—knivesII、重点短语:1.usedtodosth.过去常常做某事 否定形式: didn’tusetodosth./usednottodosth.2.playthepiano 弹钢琴3.害怕…beterrifiedofsth.如:Iamterrifiedofthedog.beterrifiedofdoingsth.如:Iamterrifiedofspeaking/beingalone.4.on副词,表示(电灯、电视、机械等)在运转中/打开,其反义词off. w