To express activities in progress at the moment of speaking.
The present continuous is used for actions happening now; an action that is going on at this very moment.
The present continuous of any verb is composed of two parts – the present tense of the verb to be: am, is, are. + the present participle of the main verb.
The form of the present participle is: base verb + ing – e.g.: walking, running, playing, shopping, smiling.