Я не знаю, о какой конкретной грамматике идёт речь, но я сделал 5 обычных предложений в Past Simple, 5 в Present Perfect, опираясь на то, что я это проходил давно.
5 предложений в Present Perfect:
1) We have never walked together.
2) They have already been to this beautiful country.
3) Somebody has stolen my smartphone in the school.
4) I have just had breakfast with my friend.
5) He hasn't eaten at this restaurant yet.
5 предложений в Past Simple:
1) I had an important phone.
2)He jumped on a trampoline.
3)She liked my interesting things.
4)My mom cooked a pancake.
5)Yesterday was Wednesday.
