to run 2

to run into' someone means to meet them unexpectedly.

• I ran into Jane in reception. I hadn't seen her for ages.
  
• Sara ran into her ex-boyfriend in the supermarket. She said it was very embarrassing.
  

'to run on' diesel or electricity means to use them for power in order to function.

• The motor runs on electricity so it's very quiet.
  
• We have a generator that runs on diesel which we use during power cuts.
  

'to run out of' something means to have no more left.

• I can't make a cake, we've run out of eggs.
  
• When I was a student and my money ran out, I lived on pasta.
  

'to run out' means to pass the time limit or expire.

• I need to get a new passport. It runs out next month.
  
• I hope they will give me a new contract when my present one runs out at the end of he month.
  

'to run over' means to hit with a vehicle.

• He's in hospital. He was run over by a car last night.
  
• You need to know where everything is in case I'm run over by a bus!
  

'to run through' means to repeat or rehearse something to practice or check

• We quickly ran through the program to check that everything was OK.
  
• Can we run through it again just to be sure we haven't forgotten anything.
  

'to run to' means to go to someone for help.

• She always runs to me when she needs some help.
  
• I'm too old to go running to my parents every time I need some money.
  

'to run up' debts or bills means to owe money.

• He very quickly ran up an enormous debt on his credit card.
  
• We ran up a big bill in the hotel drinking in the bar.
  

'to run up against' problems means to meet difficulties unexpectedly.

• We had no idea about the difficulties we would run up against.
  
• We ran up against a few problems at the beginning but now it's fine.
  

exercise1

exercise 2
exercise 3

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