Questions & Answers about Marco la página en mi libro verde para recordar la lección.
In this sentence, Marco is the verb form of marcar (to mark), in the first person singular, present tense: yo marco → Marco (I mark).
How to tell it’s a verb here, not a name:
The structure is: [verb] [direct object]
→ Marco la página = I mark the page.
If Marco were a name, you would usually expect a verb after it:- Marco marca la página. (Marco marks the page.)
- Marco abre el libro. (Marco opens the book.)
Capitalization does not help here, because the verb marco is at the start of the sentence, so it’s capitalized anyway: Marco la página…
Only the context tells you if it’s Marco (I mark) or Marco (the name). In this sentence, it’s clearly the verb: I mark the page in my green book to remember the lesson.