In this film Speedy Pete's delivery takes a turn for the worse as he endeavours to get a parcel delivered on time whilst learning about modal verbs. This clip is from the series Grammar for 11-14 ...

An infinitive is the ‘to’ form of a verb, for example to play, to watch, to be. In Spanish infinitives end in ar, er or ir. Use the infinitive to give opinions, after modal verbs, and with ...