Is there such a thing as reading passages where the passage has been specifically created with a focus on a specific part of grammar? If so, what are they called, and where can I find them?
I'm currently using readers for Spanish (such as "Read and Think Spanish" and "Stories from Spain / Historias de España"), but they don't allow me to intensively practice a particular piece of grammar, and they may contain grammar that I haven't learnt yet, which usually leads to me not attempting to understand all the grammar in the passage.