Объясните значение глагола » быть». I am a student of the Institute of Foreign Languages. We are reading the text now. She is to come in time. My friend is 20. She is very attractive.

Ответ учителя по предмету Английский язык

I am (глагол-связка) a student of the Institute of Foreign Languages. We are (вспомогательный
глагол в наст. продолж. времени) ) reading the text now. She is
(часть эквивалента модального глагола) to come in time. My friend is
(глагол-связка) 20. She is
(глагол-связка) very attractive.