When we visit the Grand Canyon, we should shouldn't don't have to mustn't( should, shouldn't, don't have to, mustn't ) pay attention to the hiking trail maps so we don't get lost.
The park regulations say you have to don't have to should shouldn't( have to, don't have to, should, shouldn't ) respect the park and not throw trash on the ground.
You remember to bring your camera so you can remember your experience.
You forget to bring a water bottle to the park if you plan on hiking.
The park rules say you feed the wildlife at the canyon.
If you want to have the most time at the Canyon possible, you wake up early.
To make sure you don't fall or hurt yourself, you get too close to the edge of the canyon.
To see to the Grand Canyon, you pay an entrance fee.
You forget to bring good walking shoes to walk around the park.
Visiting the Grand Canyon is an amazing opportunity, you enjoy it as much as possible.