Some verbs are followed by another verb that can be in the gerund or in the infinitive form, depending on the order of events.
http://www.myenglishpages.com/site_php_files/grammar-lesson-gerund-infinitive.php
There are some common examples on page 109 of Insight into Pet.
We then used them in a conversation.
To report what someone has said, use reported or indirect speech.
See here for an explanation.
https://www.ego4u.com/en/cram-up/grammar/reported-speech
A good way to practise is to read or watch an interview and report what is said.
You can find an interview to report on page 86 of Insight into PET.
See here for a video interview.
http://www.eduhi.at/dl/RSListen2_1.htm