Completar Frases Positive and negative formsVersión en línea Ejercicio para practicar la forma positiva y negativa del verbo TO BE. por José Cruz 1 am is is isn´t are not is are isn´t am is is are are are not My name Juan . I am a teacher . She fourteen years old . We students I not tired . He interested in soccer . It not a pencil . You good friends . She twelve years old . You engineers . He a doctor . It a ruler . I cold . You a teacher They are peruvians . We argentinians .
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