Раскройте скобки, чтобы получить Present Perfect или Past Simple в отрицательной форме. I … (not/ do) this exercise before. I … (not/ do) this exercise yesterday. We … (not/ go) to school since the first form. . We … (not/ go) to school yesterday. You … ( not/ see) a horse last week. You … (never/ see) a horse. He … (not /say) that yet. He … (say) that a minute ago. They … (not/ have) breakfast yet. They …( not/have) breakfast a hour ago.