According to Swan (2005), DO has four main uses - it can be an auxiliary verb, a generalpurpose verb, a substitute verb and also can use combined forms.

The sentences bellow can be completed correctly by:

Complete the gaps bellow.

I. Then he ____ a very strange thing.

II. ____ something!

III. I like ____ nothing.

IV. What shall we ____?

The words that complete, correctly and respectively, the gaps are: