Here's a grammar guide worksheet on gerunds and infinitives for intermediate students. It covers many important rules of gerunds and infinitives and also looks at some verbs which take both gerunds&infinitives with a change of meaning.
This lesson aims to interact whole class with various methods and activities to help students feel more comfortable with this grammar issue. It has aroused from the constant complaints of students who beg a rule to govern gerunds and infinitives. You can accompany this lesson with this exercise. A suggested answer key is also included.