THE HISTORY OF UFOs with the perfect progressive tenses

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Unidentified Flying Objects: A Journey Beyond the Skies

“All of the perfect tenses have been marked with colours”


Over the past century, UFO sightings have been capturing people’s imaginations, as they question the possibilities of extraterrestrial life. Thousands of individuals have claimed to witness these mysterious occurrences firsthand, and researchers have been collecting, compiling, and analyzing these accounts for years. Undeniably, the phenomenon has kept conspiracy theories alive for decades.


In this article, we will explore the world of UFOs in depth and consider different perspectives that surround these enigmatic encounters. For years, people across the globe have been reporting strange sightings in the sky. It seems that these unusual events just keep increasing in frequency.

The Beginnings of UFO Encounters

In 1947, an American businessman named Kenneth Arnold had been flying over Mount Rainier when he claimed to spot nine peculiar objects moving at incredibly high speeds. This event had set off a chain reaction of similar cases reported by countless individuals. Since then, enthusiasts and skeptics alike have been continuously grappling with the possibility of extraterrestrial life.



        1. What does “it impedes our understanding” mean?
        2. The UFO he is talking about came within 50 feet of his fighter jet and was 15 feet in diameter. What are these measurements in metric?
        3. The squadron had so many encounters with UFOs that it became part of their pre-flight briefs. What are “pre-flight briefs”?
        4. How high are these crafts being seen? Answer in feet and in metric.
        5. Do you believe that there are UFOs and beings from somewhere unknown to us amongst us?  What does the word  “amongst” mean?
UFOs – Fact or Fiction?

The subject of UFOs has always invoked a wide range of emotions and opinions, from those who staunchly believe in their existence to those who dismiss them as mere figments of overactive imaginations. Despite the heated debates that continue to surround this topic, there has not been any definitive proof or concrete evidence that could either validate or debunk their existence unquestionably.

Government Involvement and Cover-ups

Growing suspicions over the years have led many to believe that various government agencies might be concealing information relevant to UFO sightings. For instance, some controversial incidents like the infamous Roswell UFO crash in 1947 fueled conspiracy theories among enthusiasts.


1. Choose the correct tense of the verb: Last night, the UFO (landed/has landed) in my backyard.

2. Correct the mistake in this sentence: The alien we seen coming out from a UFO was friendly.

3. Fill in the blank with the appropriate preposition: The UFO hovered ________ (above/with) the trees before disappearing into the night sky.

4. Identify the correct conditional: If I _____ (would see/were to see) a UFO, I would take a photo.

5. Combine these two sentences using a relative pronoun (who, whom, whose, which, that): The UFO emitted a bright light. It blinded us when we looked up at the sky.

6. Select the appropriate modal verb: People _______ (should / might / must / can’t) believe in UFOs because there is some evidence to support their existence.

7. Rewrite this sentence in passive form: Scientists are researching about life beyond Earth and gathering evidence of unidentified flying objects.

8. Identify and correct the mistake in this question tag: This UFO sighting isn’t recent news, is it?

9. Choose between “fewer” or “less”: We have seen ______ UFO sightings this year than last year.

10. Complete the reported speech sentence by changing from direct speech: She said, “I saw a UFO last night.” She told me that she _________ a UFO last night.

Investigations into UFO Sightings

Throughout history, numerous groups and organizations have dedicated their time and resources to investigate these mysterious phenomena. Project Blue Book, for example, had been the United States Air Force’s official study of UFO sightings that aimed to assess the nature and potential threats posed by these experiences. The programme had been running for over two decades before being shut down in 1969.

A Future Filled with Uncertainty

While humankind has been making tremendous strides in space exploration and scientific discovery, many questions are still left unanswered. At this point in time, it can be said that we have only just begun to scratch the surface of our understanding of life beyond Earth. As technology continues to advance rapidly, it is not unreasonable to expect more clarity on the subject in the years to come.

Questions about the grammar used:

1. Find an example of Present Perfect Progressive tense in the article?
2. Can you find the use of Past Perfect Progressive tense in the text?
3. Where is the Future Perfect Progressive tense implemented within the piece?
4. Why would one choose Present Perfect Progressive tense instead of simple past tense when discussing UFOs?
5. How does Past Perfect Progressive tense add depth to storytelling in this article?
6. What effect does using Future Perfect Progressive tense have on predictions made in the conclusion?


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