In good hands
In the safe and competent care of someone.My dog was in good hands when my father looked after him.
In good faith
With good and honest intentions.Our company was bargaining in good faith when they met the other company.
In good conscience
Having good motives.I wrote the letter and complained to the woman in good conscience.
In general
In most situations or circumstances.In general, most people are happy with the new manager.
In full swing
In progress.The campaign to stop people from smoking is in full swing.
In full
Completely, fully, totally.The woman pays everything that she owes on her credit card in full every month.
In force
In a very large group.The fans came out in force to cheer for their favorite team.
In for (something)
Unable to avoid something, sure to get something.The student is in for much trouble now that he cannot finish his graduation essay.
In flux
In constant change, changing.The school administration has been in flux for several months now.
In flight
While flying.Two wonderful meals were served while we were in flight.