Let's translate the original text into English while transforming it into the past tense step by step.
Original text in Russian: "Путешествия — мое любимое занятие. Мы с родителями много путешествуем и посещаем разные страны. Мы видим их зимой и весной, летом и осенью; когда идет снег и светит солнце, когда идет дождь и когда мороз. Мы не берем с собой тяжелые сумки, когда куда-то уезжаем, но всегда делаем много фотографий."
Translation into English:
Traveling is my favorite activity.
(This remains unchanged as it's a general statement and doesn't require a time change.)My parents and I travel a lot and visit different countries.
"My parents and I traveled a lot and visited different countries."We see them in winter and spring, summer and autumn; when it snows and the sun shines, when it rains and when it's frosty.
"We saw them in winter and spring, summer and autumn; when it snowed and the sun shone, when it rained and when it was frosty."We do not take heavy bags with us when we go somewhere, but we always take many photos.
"We did not take heavy bags with us when we went somewhere, but we always took many photos."
Now, let's put everything together to form the complete text in the past tense:
Complete text in the past tense: "Traveling is my favorite activity. My parents and I traveled a lot and visited different countries. We saw them in winter and spring, summer and autumn; when it snowed and the sun shone, when it rained and when it was frosty. We did not take heavy bags with us when we went somewhere, but we always took many photos."
Now the text is written in the past tense, and all changes are grammatically correct.