1) https://agendaweb.org/exercises/verbs/infinitive-gerund/infinitive-to-1

2) https://agendaweb.org/exercises/verbs/infinitive-gerund/infinitive-to-2

3) https://www.ego4u.com/en/cram-up/tests/infinitive-gerund-1

4) https://www.ego4u.com/en/cram-up/grammar/infinitive-gerund/exercises?02

5) https://www.ego4u.com/en/cram-up/grammar/infinitive-gerund/exercises?03