Questions & Answers about Vedrò la luna e saprò il tuo segno.
Why are the verbs vedrò and saprò missing a vowel in the middle?
Both vedere (to see) and sapere (to know) are irregular in the future tense. Instead of using their full stems (veder- and saper-), they drop a vowel to become vedr- and sapr-. Then you just add the regular future ending, which is -ò for the "I" form.
Are there other verbs that drop a letter in the future tense like this?
Yes! This is a common pattern for a specific group of irregular verbs. You will also see this stem-dropping with andare (to go, becoming andr-), dovere (to have to, dovr-), and potere (to be able to, potr-).
Why do we say il tuo segno instead of just tuo segno?
In Italian, possessive adjectives like tuo (your) almost always need a definite article (like il or la) in front of them, making it literally "the your sign." The main exception is for singular family members (like mio fratello), but for a normal noun like segno (sign), you must include the il.
Why use the future tense of sapere (saprò) here instead of conoscere for "I will know"?