• in time
• in demand
• in of focus
• in an uproar
• in answer to
• in anticipation of
• in arrears
• in danger
• in debt
• in decline
• in defense of
• in detail
• in disgrace
• in disguise
• in fact
• in fairness to
• in favor of
• in fear of
• in flames
• in flower
• in full
• in future
• in gear
• in general
• in good condition
• in good faith
• in hand
• in harmony (with)
• in haste
• in hiding
• in high spirits
• in honor of
• in horror
• in ink

PREPOSITIONS – ON-

• on watch
• on schedule
• on the record
• on the road
• on oath
• on pain of
• on the air
• on balance
• on a diet
• on a journey
• on a trip
• on a large scale
• on a small scale
• on a pension
• on a regular basis
• on a spree
• on account of
• on an expedition
• on an island
• on approval
• on average
• on bail
• on behalf of
• on board
• on business
• on order
• on remand
• on show
• on strike
• on suspicion of
• on the agenda
• on the brinkof
• on the dot
• on the edge of

 PREPOSITIONS – AT-

• at high speed
• at risk
• at one’s side
• at a fraction of
• at the outset
• at the end
• at sight
• at the double
• at one time
• at a discount
• at a distance
• at a glance
• at a guess
• at a loose and
• at a loss
• at a low ebb
• at a price
• at a rate of
• at a speed of
• at a standstill
• at all costs
• at all events
• at issue
• at large
• at least
• at length
• at liberty
• at most
• at night
• at noon
• at one’s leisure
• at one’s request
• at peace
• at war

PREPOSITIONS – BY-

• by law
• by nature
• by far
• by design
• by chance
• by the name of
• by luck
• by accident
• by air
• by sea
• by land
• by all accounts
• by all means
• by any standard
• by appointment
• by birth
• by check
• by coincidence
• by courtesy of
• by definition
• by degrees
• by design
• by dint of
• by far
• by force
• by hand
• by heart
• by law
• by marriage
• by means of
• by mistake
• by my watch
• by nature
• by no means
• by request
• by rights
• by sight