Breakdown of Camminavo sul sentiero quando improvvisamente ho visto un serpente.
un
a / an (masculine)
quando
when
vedere
to see
su
on, about
Questions & Answers about Camminavo sul sentiero quando improvvisamente ho visto un serpente.
Why do we use the imperfetto (camminavo) for the first verb, but the passato prossimo (ho visto) for the second?
This is a classic combination! Camminavo (I was walking) uses the imperfetto because it describes an ongoing background action. Ho visto (I saw) uses the passato prossimo because it is a sudden, completed event that interrupted that background action. Quando (when) is often the bridge between these two tenses.
Could I use mentre (while) instead of quando (when) in this sentence?
Not exactly in this spot. Quando introduces the sudden interrupting action (quando... ho visto). If you want to use mentre, it has to go in front of the ongoing background action. You could rewrite the sentence as: Mentre camminavo sul sentiero, improvvisamente ho visto un serpente (While I was walking on the path, I suddenly saw a snake).
Why is it sul sentiero instead of just su sentiero?
Sul is an articulated preposition, which means it merges the preposition su (on) with the definite article il (the). Because sentiero is a masculine singular noun starting with a single consonant, it takes the article il. Su + il always becomes sul.
How is the word improvvisamente formed?