I’m going back.
Now, I will teach you about conjugation in the past. Usually, in a sentence we would find like this “Examination is easy yesterday”, that means “easy” must be changed to past.
For show it that’s past, then we must add “Datsuta ” [ だつた ] in the last of noun or adjective. And it will be :
easy [ かんたん ] –> かんたんだつた “Kantandatsuta”
Other examples :
Friend [ ともだち ] –> ともだちだつた “Tomodachidatsuta”
Pretty [ きれい ] –> きれいだつた “Kireidatsuta”
That’s all. I hope you can understand and enjoy it. がんばって!! ^.^