decide to
intend to, plan to, want to
be ready to
We were all packed and ready to leave.

be about to, be going to
Did you want something? I was just about to leave.

threaten to
My secretary has threatened to leave.

attempt to, try to
They were caught trying to leave the country.

refuse to
be compelled to, be forced to, be obliged to
ask sb to, order sb to
They were being extremely rowdy and the manager had to ask them to leave.

allow sb to, let sb
I wanted to leave but they wouldn't let me.

enable sb to

for
They left for Scotland this morning.

Leave is used with these nouns as the subject:
bus, cubicle, employee, expedition, ferry, flight, path, procession, ship, train, troops, vessel

Leave is used with these nouns as the object:
academy, address, airport, airspace, area, arena, army, atmosphere, bag, barracks, bedside, bequest, blank, boyfriend, bruise, bus, business, cabinet, camp, car, church, clearance, clue, college, comment, committee, company, confines, convent, country, crater, crumb, dent, deposit, desk, dock, earth, education, elevator, employment, estate, field, fingerprint, firm, flat, fold, footprint, fortune, gap, garbage, gash, ground, group, harbour, highway, home, homeland, hospital, husband, impression, imprint, inheritance, instruction, job, key, land, legacy, litter, lover, mall, mansion, margin, mark, mess, message, military, ministry, monastery, motorway, nest, note, office, orbit, party, path, port, post, practice, premises, profession, region, restaurant, restroom, ring, road, room, roundabout, rubbish, safety, sanctuary, scar, scene, scent, school, scope, scratch, seat, service, shelter, shore, signature, smear, staff, stage, stain, station, survivor, table, taste, team, territory, theatre, time, tip, town, trace, track, trail, train, tunnel, university, vacancy, vacuum, valley, vicinity, void, washing-up, welfare, widow, wife, will, workforce, yard, zone