Question

The present tense expresses an action that is repeated, always true, or happening right now.

I often buy muffins at this bakery.
The past tense expresses an action that has already occurred.
I tossed the ball in the air and hit it hard.
The future tense expresses an action that will take place in the future.
Sharon will subtract the numbers.
The present perfect tense expresses an action that took place at some time in the past or
an action that began in the past and is still continuing.
Jake has gathered the flowers.
The past perfect tense shows that one action in the past began and ended before another
action started.
He had already come inside by the time it started to rain.
The future perfect tense shows that an action in the future will begin and end before
another action begins.
I will have finished my exam by the time yours begins.
Exercise 1 Draw two lines under each verb. Write in the blank the tense of the verb.
past
Dr. Della Chiesa told us a strange story yesterday.
1. There is an island in the Pacific called Guam.
2. As an animal specialist, he visits the island often.
3. By the 1960s, game wardens on Guam had noticed a decrease in the bird
population.
4. However, no one found any bodies of dead birds.
5. By the 1980s, some species of birds had almost disappeared.
6. What had endangered so many birds to the point of extinction?
7. After much study, Julie Savidge, a biologist, reached some conclusions.
8. She ruled out disease and loss of habitat as the culprits.
9. Then she discovered a relationship between the disappearance of birds and the
increase of brown tree snakes.
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Answer 1

The subject of this question is Biology, and the student is asked to identify the tense of the verbs in the given sentences.

Step-by-step explanation:

The subject of this question is Biology. The student is asked to identify the tense of the verbs in the given sentences. The past tense is used to describe actions that have already occurred. In the given sentences, the past tense is used in sentences 1, 3, 4, 5, and 8. These sentences describe actions that happened in the past.

Learn more about Tenses in English