①被动句:apples and bananas are cut up by a knief
②主动句:I cut these apples and bananas with a knief
③强调句:it's a knief that I cut these apples and bananas up
①被动句:apples and bananas are cut up by a knief
②主动句:I cut these apples and bananas with a knief
③强调句:it's a knief that I cut these apples and bananas up