What is the bold words? Please tell me, I need to know what the bold words are! Please respond to me.
When using the perfect tenses of verbs, it's necessary to add a helping verb.
For example: I have been working on that paper for weeks.
Have and been are helping verbs, and the whole tense is called present perfect progressive.
Do a short summary of what the whole concept of the book is about and explain the meaning behind of it in a short paragraph.
