‘Do’ is an action verb. It can function as a main verb or an auxiliary verb.
It can mean many different things including:
- Perform an action e.g. I do taekwondo every Saturday.
- Be suitable e.g. Can someone help me carry this box? Anyone will do.
- Achieve e.g. I did 50 lengths of the pool before breakfast.
Let’s see how ‘do’ can be used as an auxiliary.