Преобразовать в canditionals: if i went to london, i’d visit the tower. if i visited the tower, i would see ravens there if i saw ravens there, i’d take their pictures. if i took pictures, i’d show them to my friends if i showed them to my friends … сделать общую

Once i decided to take a trip ahead london but under circumstances i didnt manage to. If i went there, i would visit the Tower and see ravens. Furthermore i would take a few photos there so as to show my friend. If i showed the photos, my friends would admire me.