 time flies  This common idiom means that time passes quickly.  'Time flies when you are having fun.'

 on time  to be on time means not to be late. You arrive at the right time.  'The trains always run on time in my country. They are never late.'

 in the nick of time  This expression means that you arrive or finish something just before it is too late. At the last possible moment.  'My team scored in the nick of time. The game was in the last few seconds.'

 turn back the hands of time  To turn back the hands of time means to go back to the past.  'If I could turn back the hands of time, I wouldn't have done what I did.'

 save time  We save time when we do something the quick way.  'We will save time if we drive instead of taking the bus.'

 spare time  In natural English, spare time has the same meaning as free time. The things we do when we are not busy with work or study  'In my spare time I like to learn English.'

 as time goes by  As time goes by means as time passes or moves. The passing of time.  'As time has gone by I have become less interested in going to nightclubs on the weekends.'

 out of time  Out of time means that there is no more time left to do something. The time limit or deadline has been reached.  'Please stop writing. You are out of time. The exam has finished.'

 make time  To make time means to find the time to do something. We have to clear some time in our schedules to do something.  'I know that you are busy, but you will have to make time to attend the meeting.'

 time for a change  Time for a change means to stop what you are doing and start doing something else with your life.  'After working in the same job for 5 years, I now feel like it is time for a change.'

 time is money  The famous expression time is money means that your time is a valuable commodity.  'I can't wait here all day. Time is money, you know?'

 time heals all wounds  Time heals all wounds means that our feelings of hurt will leave us time passes by. This expression usually refers to emotional hurts and not physical ones.  'I was sad for a long time after I broke up with my boyfriend, but time heals all wounds. I'm fine now.'

 only time will tell  Only time will tell means that we cannot find out the truth or the answer yet. We will have to wait and then we will find out in the future.  'Will we ever have peace in the world? Only time will tell.'

 time after time  When something happens or is done time after time it means that it happens again and again. The action repeats.  'Time after time Tom was late for school. His teacher told him if he was late again he would be in big trouble.'

 kill time  To kill time means to do something that is not very interesting or important to pass time. We usually use to kill time when we are waiting for something that will take place later.  'We've got 4 hours until our flight leaves. What are we going to do until then? How are we going to kill time?'

 time off  Time off means to take a holiday from work.  'You are working too much. You need to take some time off.'

 a waste of time  A waste of time refers to anything that is not a useful way to spend your time. Doing something pointless or useless.  It's a waste of time calling that company. They never answer the telephones.'

 a hard time  To have a hard time means to do something that is difficult or to suffer hardship.  'She's had a hard time recently; she lost her job and then her mother died.'

 too much time on my hands  To have too much time on your hands means that you have too much free time and not enough things to do.  'He watches so much TV because he has too much time on his hands.' He needs to get a job.'

 a whale of a time  To have a whale of a time means to have a great time. To do something really fun.  'I had a whale of a time at your party. Please invite me to your next one.