Two types of 'now' in the progressive tense that even advanced English learners often don't know

There are two types of 'now' in the progressive tensePlease look at the following English sentence.I'm reading a book about ...
VOA Learning English

Present Progressive Tense and Showing Annoyance

Samantha Fish is an American songwriter and blues singer. In her song Somebody's Always Trying, she complains about other, unnamed women. She accuses them of trying to take her boyfriend away from her ...
TES

PRESENT PROGRESSIVE TENSE

This worksheet is all about present progressive or continuous tense.The PRESENT PROGRESSIVE TENSE indicates continuing action, something going on now. This tense is formed with the helping “to be” ...
TES

Present Progressive Learning Guide & Mastery Worksheet

A simple, structured and accessible learning guide for the present progressive tense using a colour coded system to support learning. A Mastery Worksheet is also provided with answers included. A ...