1) This document discusses the use of the present continuous tense in English, which is formed using the verb "to be" plus the "-ing" form of the main verb. 2) The present continuous is used to describe actions that are happening or in progress at the present moment, such as "This baby's playing with his toy" or "She's sitting in her highchair." 3) It can also describe temporary activities or changes from normal routines, like "He's staying at home because he's got a cold" instead of his usual activity of going to playschool.