Напиши предложение вставив нужную форму глагола am is are fred and bess … students.they … good students.rex … my dog.lizzy … a pipul.

F and B are friends
they are good students
R is my dog
L is a pupil

Are используется во множественном числе, Is в единственном.
Fred and Bess ARE students
They ARE good students
Rex IS my dog
Lizzy IS a pupil