Complex sentence: Amy insists on reading ahead, but the Doctor warns her that anything she reads will be destined to happen, and instead attempts to take the TARDIS back to the 1930s, finding the time machine struggling to make the journey.
Split into simpler sentences: Amy insists on reading ahead, but the Doctor warns her that anything she reads will be destined to happen. Instead, they attempt to take the TARDIS back to the 1930s, finding the time machine struggling to make the journey.