The present continuous tenseA grammatical category that is marked by verb inflection. To express when an event or action happens in time or when a state exists, we use tenses. expresses that an actionA general term expressing that somebody or something does something is in progressAn action is in progress when it is happening. E.g.: When I arrived he was surfing. ("he was surfing") at the time of speakingA point of time at which an utterance is made..

"What are you doing?"
"I am reading a book."

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It's drizzling.

Form: present continuous
Present continuous Present continuous for developing states