And the same thing if i start with present can i change it to past in the same essay, or not. tell me please im taking english 102 and sometimes i get confused with that tell me please, thank you.
Yes you can. as long as what you are telling is the event of today (at present time) for example if we talked about our last love. Still we can tell where she/he is now and how his/her life is to day.
On a more recent note, you may remember, recently with a transition in front. Those are a few helpful transitions but yes very easily.
As a flashback u can but u have to use words like i remeber when and things like that and put was insteas of is.
Yes you can, you just have to do it correctly