Active Infinitives end in these two letters if the verb stem ends in a vowel.
What is -ri?
The accusative + infinitive is used with these kinds of verbs.
What are verbs of perception (vide-, audi-)?
Necesse est means this in English.
What is "It is necessary"
This verb is used with the infinitive and means to want.
What is vult/volunt?
If the verb stem ends in a consonant or short "i" then you must add this letter between the stem and the ending.
What is the letter "e."
What is -ī?
The person being seen or heard to do something goes in this Latin case.
What is the accusative?
The person for whom it is necessary to do something goes in this Latin case.
What is the dative?
This verb is used with infinitive and means it is necessary.
What is necesse est.
This is the active infinitive form of the verb stem nata-.
What is natare?
This is the translation of amarī in English.
What is "to be loved."
What is the infinitive?
Translate this sentence into Latin: It is necessary to have food.
What is: Necesse est cibum habere.
This verb means to dare and is used with the infinitive.
What is audet, audent?
This is the active infinitive form of the verb vide-.
What is videre?
This is the passive infinitive of the verb stem vide-.
What is viderī?
Translate this sentence into Latin: The boys hear that Iulia sings.
What is: Pueri Iuliam canere (or cantare) audiunt?
Translate this sentence into Latin: It is necessary for man to breathe.
What is: Necesse est hominī spirare.
This is infinitive for the irregular verb est/sunt "to be."
What is "esse"?
This is the active infinitive form of the verb stem sum-.
What is sumere?
This is the passive infinitive of the verb stem viv-.
What is vivī?
Translate this sentence into Latin: Quintus sees that Iulia is hit by Marcus.
What is: Quintus Iuliam a Marcō pulsarī videt.
Identify the noun in the dative in this sentence: Necesse est Marcō ēsse.
What is Marcō?
This is the infinitive of the verb potest/possunt meaning to be able.
What is "posse"?