Infinitives and Infinitive Clauses

Infinitives - KEY

1. The present active infinitive is the second principle part of the verb.
2. The endings of the present active infinitive are: 1^st conjugation -âre; 2^nd conjugation -êrî; 3^rd conjugation -ere; 4^th conjugation îre.
3. The present passive infinitive of 1^st conjugation verbs ends in letters -ârî; the 2^nd conjugation in -êrî; the 4^th conjugation in -îrî.
4. The perfect active infinitive is formed by adding -isse to the perfect active stem.
5. The perfect passive infinitive is formed by using the word esse with the perfect passive participle.
6. The future active infinitive is formed by using the word esse with the future active participle.
7. What letters are the sign of the future active infinitive (and future active participle)? -ur-
8. What English word, derived from the future active participle of sum, contains these letters? future

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