to be / to be (to exist) / used to form past tense forms of verbs with past participles / used to form future tense forms of verbs with infinitives / used to form conditional mood forms of verbs with past participles / used to form passive voice forms of verbs with passive participles / used to form conditional forms of verbs with past and passive participles

to be glad

to leave alone

(idiomatic) to be able to, to be capable

(idiomatic) to be able to, to be up to

(idiomatic) to be all ears (to listen carefully or eagerly)

(slang) to be drunk

(idiomatic, sarcastic) to be worthless, to have no use, to suck

(idiomatic) something is agreed by both parties, close to signed, sealed, and delivered (often used, but not necessarily, when speaking about a wedding)

(idiomatic, sarcastic, vulgar) to be worthless, to have no use, to suck