IN

in the field (of)

in step with

in advance

in agreement

in case of

in charge of

in danger

in doubt

in detail

in favor of

in general

in pain

in the end

in the meantime

in secret

in private

in moderation

in tears
in reality
in bed
in the northern hemisphere
in summertime
have confidence in (someone)
believe in
in theatres
in the first stage
believe in
in love with me

ON

the joke is on you

on the house

take somethin on good faith

take someone on their word

on trial 

on the topic of
on top of it

on track

on target

on average

on behalf of

on display

on account of

on edge

on foot

on good terms

on leave

on occaision

on your own

on purpose

on second thought

on strike

on a whim
on the bed
on tap
on the menu
work on
focus on
on vacation
on the other hand
on the border
on my team
on the team
on the beach
on Christmas
on Monday
on two conditions
on maternity leave
highways to drive on
on our own
work on KPE
talk on the phone
on the weekend
put shoes on him
on the street
on the weekend
on the weekend
depending on
to have money on you

on the house

AT

at an advantage

at a disadvantage

at any cost / at all costs

at a distance

at any rate

at ease

at a glance

at hand

at large

at length

at liberty

at most

at odds (with)

at once

at the latest

at random

at risk

at the outset

at short notice

at a standstill

at times
at 7 am
at the bus stop
at night
at a good point
at a party
at the farm
stay at
at 3 years old
had me at 20 (years old)
angry at me