As I'm working on vocabulary, I'm doing all I can on my flashcards to stay "in Latin" as much as possible (as opposed to English translations), and also to use as much "natural" Latin as possible.
For instance, a flashcard with a singular present active indicative forms of "amo" would appear like this:
(ego) amo (tu) amas (is/ea/id) amat
The pronouns in parentheses are valid Latin (even though they're not required), and also a reminder that this is first person, second person, and third person, respectively.
In English, the present active infinitive of "love" is "to love". In Latin, it is "amare"--but I wonder, is there a "helper word" that is valid Latin that could be used as a reminder that we're looking at an infinitive form? Perhaps an adverb that could go before or after the infinitive, and is commonly used with infinitives in Latin?
If there is no helper word, perhaps another way to ask this question is: what would the shortest, most concise way in Latin to form a sentence that uses an infinitive? I could (if its generic enough) use that as a "model sentence" and then insert any given infinitive into that model sentence for drilling.