Gerunds are the -ing form of a verb, and infinitives are the to + base form. These words can be confusing; they combine the meaning of a verb with the grammar of a noun. My father asked me to ...

In Learners' Questions in Session 4, Dan looks at phrasal verbs with the word pop. Here's a guide to phrasal verbs. Multi-word verbs / Phrasal verbs type 1, 2, 3 & 4 ...