(CAN) [verb] [+ to infinitive] I am you/we/they are he/she/it is, being, [past simple] I/he/she/it was you/we/they were, [past participle] been - used to say what can happenThe exhibition of modern prints is currently to be seen at the City Gallery.
BE
Meaning of BE in English
Cambridge English vocab. Кембриджский английский словарь. 2012