Question

1. scientists are discovering that we have a lot in common with our ancestors.
2. louis leakey was trying to learn more about the life - style of early people.
3. tomorrow, we will be watching a documentary about the leakeys discoveries.
4. our teacher is planning to show photographs of her trip to africa, where she went to a site with real fossils.
5. i am hoping to study fossils one day.

b read each sentence. write the helping verb that makes the progressive form shown in parentheses.

1. i ______ finishing a report about how primates use tools. (present progressive)
2. alicia and i ______ presenting on lemurs next week. (future progressive)
3. we ______ finding out what lemurs eat and where they live. (future progressive)
4. dr. sanchez, a primate specialist, ______ describing a lemurs sleeping patterns to some students when we arrived at the exhibit. (past progressive)
5. dr. sanchez ______ explaining that some primates are nocturnal, meaning they sleep during the day and wake up at night. (past progressive)
6. we ______ wondering about the sleeping patterns of lemurs when alicia found a book about nocturnal animals. (past progressive)
7. the next time we talk to dr. sanchez, we ______ asking her to tell us more about what lemurs do for fun. (future progressive)
8. today, we ______ speaking to the class about the social lives of lemurs. (present progressive)
9. for our presentation, alicia ______ drawing a map of madagascar that shows where different lemurs live on the island. (present progressive)
10. to explain how social lemurs are, i ______ showing a video of lemurs grooming each other. (present progressive)

Explanation:

1. The present progressive tense uses "am/is/are + verb - ing". For "I", the helping verb is "am".
2. The future progressive tense uses "will be + verb - ing".
3. The future progressive tense uses "will be + verb - ing".
4. The past progressive tense uses "was/were + verb - ing". For "Dr. Sanchez (a singular subject)", the helping verb is "was".
5. The past progressive tense uses "was/were + verb - ing". For "Dr. Sanchez (a singular subject)", the helping verb is "was".
6. The past progressive tense uses "was/were + verb - ing". For "We (a plural subject)", the helping verb is "were".
7. The future progressive tense uses "will be + verb - ing".
8. The present progressive tense uses "am/is/are + verb - ing". For "we", the helping verb is "are".
9. The present progressive tense uses "am/is/are + verb - ing". For "Alicia (a singular subject)", the helping verb is "is".
10. The present progressive tense uses "am/is/are + verb - ing". For "I", the helping verb is "am".

Answer:

1. am
2. will be
3. will be
4. was
5. was
6. were
7. will be
8. are
9. is
10. am