Examples:

• They called off the match due to bad weather.

  (Noun object match comes after the particle off . Call off = stop a planned event or activity from taking place)

• They called on her for some legal advice.

  (The phrasal verb called on cannot be separated. Not : They called her on for some legal advice. Pronoun object her comes after the particle on . Call on = pay a brief visit)

• We came across some old photos of granny in her school days.

  ( Come across = find something by chance)

• He will look after my dog while I am away.

  ( Look after = take care of)

• They looked through the drawer but couldn't find it.

  ( Look through = examine briefly and carefully in order to discover something)

• He pointed out the accused to the police.

  ( Point out = direct attention to someone [or something] by pointing)

• I ran across the grandmother of my ex-girlfriend.

  ( Run across = meet [someone] unexpectedly)

• Jack ran into Jill while he was on his way home.

  ( Run into = meet by chance)

• She tried on a few pairs of shoes but they didn't fit her large feet.

  ( Try on = put on something to see if it fits and how it looks)

• He had to turn down the job that was offered to him.

  ( Look after = take care of)