Gerund, to-infinitive or infinitive without to . After a while the journalists began asking questions. After some verbs either to-infinitive or gerund can be used. With these words the gerund is used for statements in general, to-infinitive is used if the statement is true in one specific situation. I like to go to the trade fair tomorrow.
Some verbs take the gerund when there is no object but get to-infinitive when there is an object.
We allow smoking here. We allow our personnel to smoke here. After some verbs either to-infinitive or gerund can be used but the meaning of the sentence changes. We stopped buying a drink at Mr William's shop . We stopped to buy a drink at Mr William's shop.