Wich is the correct way to write a phrasal verb in past?

To save something, usually time or money, for a special purpose.

To stop doing something that you do regularly.

Living or working without someone or something.

To discover a fact or piece of information.

To be able to understand something or to solve a problem

To stop working (a machine or a vehicle).

To consider a problem or decision carefully.

To give back all the money that you have borrowed from someone or a bank.

To trust someone because you think that they can do something well or that they are a good person.

To take care or educate a child until he or she becomes an adult.