leave vs left

Some examples from the web:

• He also requested two weeks unpaid leave.
• Don't leave town without my permission.
• The airlifts leave from 40th and Park.
• You have permissión to leave Granada.
• You saw me leave the pub.
• Suspected contraband can't leave the country.
• Please leave town until you get better.
• Please leave all metal objects you are carrying.
• Tyler can leave the toilet seat up.
• Don't leave the station except patrols.
• Picking a nice time to leave town.
• Words and phrases leave you cold.
• Please leave your entourage here in Sunpu.
• Your request to leave Berlin is unacceptable.
• Suspect will often leave something behind.
• Civic duties leave little time for a sandwich.
• You have 10 days to leave Canadian territory.
• The only way that happens is you leave Princeton Plainsboro.
• Could never leave, even we wanted.
• Barca has never mentioned desire to leave these walls.

Some examples from the web:

• I knew I left that journal somewhere.
• All those people we left behind.
• And his left arm extends straight.
• Hook, hook, hook, left, left, left.
• We heard somebody was left behind.
• A document that Yoshizawa left behind.
• And apparently left you some money.
• You probably never left the West End.
• Our ghost has left a reflection.
• He left us money for repairs.
• I left a trail even Wally could follow.
• So I understand john gilbert has left town.
• I just left that grieving, dignified woman...
• I left an AA meeting for this.
• When she left, Bartel's sense of humor left too.
• The couple left early the next morning.
• Drive. mile to destination on left.
• Assuming Batman left anyone to buy from.
• Your lab was shutdown after you left.
• Humans left 25,000 objects orbiting the Earth.