am/is/are - формы глагола BE (быть) во временах Presentкогда говоришь о себе - am ( I am friendly) когда говоришь мы, они, вы, ты - are ( We are friendly, they are friendly, you are friendly)когда говоришь он, она, оно - is (She is friendly, he is friendly, it is friendly)N't или not ставится в отрицательной форме(She isn't friendly, he isn't friendly, it isn't friendly)