On page 161 of our text book we find an explanation of the grammar talking about verb + gerund or infinitive, which says that using the same verb among gerund or infinitive the meaning will be different, but it does not apply to all the verbs. I will write the examples with my own words. Verb + gerund She will never forget getting a ride into a haunted castle . Meaning: She will not erase that experience of her mind. They remember switching the lights off when they went on vacations . Meaning: Talking about the past. Verb + infinitive The lights were all burned because he forgot to switch off the control panel . Meaning: He forgot to do the action. Remember to switch off the lights when you go out . Meaning: It's a reminder. Talking about the future. It does not apply to all the verbs, i will write examples in which the meaning does not change: My father continue smoking. My father continue to smoke. I start playing soccer. I start to play socce...