Which verb form is used to indicate the progressive tense?

a verb + -ed
b be + verb + -ing
c have + been + verb + -ing
d have + verb + -ed

While doing your research, all of the following would be good secondary sources to use to develop a general overview about the vietnam war, except: a. the encyclopedia britannica b. an interview with a veteran of the war c. a textbook on the history of the 20th century d. an online resource such as ‘wikipedia.org’ or ‘’

Essay about how to keep environment clean and safe?

Find a newspaper or magazine (either print or digital form), and select one piece of media to evaluate. after reading/viewing the media, describe it, and explain what you believe the purpose and intended audience of the piece may have been. then, label the techniques (images, layout, video, sound, etc.) that were used, and how those techniques interacted to create either an effective or ineffective piece of media. your response should be at least 200 words.