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;;Be动词基本用法口诀;Bob;;;;;;;;;;;;;;;;;Findthemistakeineachsentence.;1.Behindthehouse_______(be)sometrees.2.Everystudentandeveryteacher_______(come)toschoolontimeinthemorning.3.Something______(be)wrongwithyourwatch.4.HeaswellasI______(have)beenthere.5.TheGreens____(be)havingdinneratthattime.6.Hisfamily____(be)notalargeone.7.Threehours____(