The suffix for forming past tense in Turkish is -di. If you studied present tense i can say that past tense is easy as present tense. Lets Learn Turkish grammar!
Gelmek (To come)
gel+di+m (I came)
gel+di+n (You(singular) came )
gel+di (He-She-It came)
gel+di+k (We came)
gel+di+niz (You(plural) came)
gel+di+ler (They came)
hapşurmak = to sneeze
hapşur+du+m
hapşur+du+n
hapşur+du
hapşur+du+k
hapşur+du+nuz
hapşur+du+lar
Just to show you another piece of grammar i will show you a strange thing about Turkish language. I guess at first this will be really hard for foreigners at least for people who are not in Ugric Altaic Language Family (Finnish-Magyar etc).
Gitmek = to go
git+ti+m <—- be careful to the change of d –> t
git+ti+n
git+ti
git+ti+k
git+ti+niz
git+ti+ler
This is the change of the letters a like.Will see it in later courses.