1. Verbs that require prepositions when used with the infinitive.
D’Accord 2 Leçon 3A.1
Verbs that require prepositions when used with the infinitive.

2. Point de départ
Infinitive constructions, where the first verb is conjugated and the second verb is an infinitive, are common in French.

4. Some conjugated verbs are followed directly by an infinitive
Some conjugated verbs are followed directly by an infinitive. Others are followed by the preposition à or de before the infinitive.
accepter de
cesser de
essayer de
penser à

5. *Place object pronouns before infinitives.
J’hésite à dire la verité à Frank.
J’hésite à la lui dire.

6. Note the use of the infinitive in the following sentences:
Je suis heureux de faire ta connaissance.
Catherine est contente d’aller à Paris.
Nous sommes tristes de partir.
adjectives DE
infinitive

7. The infinitive is also used after the prepositions pour , sans and avant de.
pour  for sans  without avant de  before

8. Je travaille pour gagner de l’argent.
Prends de l’essence avant de partir.
Ne pars pas sans mettre ta ceinture.
*The infinitive is used after prepositions like pour (for/in order to), sans (without), avant de (before).