Подчеркните инфинитив одной чертой, а герундий - двумя чертами. 1. john stopped to talk to the manager. 2. after receiving our order, let us know the exact date of delivery. 3. the most important function of wholesaler is to contact manufacturer and potential customer.

1. John stopped [to talk] (inf) to the manager. 2. After [receiving] (ger) our order, let us [know ] (inf) the exact date of delivery. 3. The most important function of wholesaler is [to contact] (inf) manufacturer and potential customer.

Геррундий: stopped; receiving
инфинитив: to talk ; know; to contact