Grammar and Language Workbook

1. In 1957 a Soviet rocket launched Earth’s first artificial satellite, Sputnik I.
2. Satellite pictures, exact maps of Earth, can pinpoint the spread of plant diseases.
3. Meteorologists, scientists who study weather, can predict dangerous storms using radio waves
converted to pictures.
4. Communication satellites, receivers and transmitters of radio waves, make communication
possible from continent to continent.
5. Geostationary satellites, satellites that orbit at the same speed as Earth’s rotation, are used for
telecommunications, weather forecasting, and even spying.
6. Space probes, satellites that travel close to other worlds, were first launched in 1959 when the
first probe raced past the moon.
7. In 1974 the Mariner 10 came within 203 miles of Mercury, the planet closest to the sun.
8. Probes of Mars, the planet most like Earth, help us understand our own planet.
9. Voyager 1 and Voyager 2 were probes that photographed the planet Jupiter.
10. Few countries have launch sites, points from which a rocket can carry a satellite into space.
Name ___________________________________________________ Class _________ Date ____________________
90 
Grammar and Language Workbook, Grade 12
Copyright © by Glencoe/McGraw-Hill
Grammar

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Lesson 21
Infinitives and Infinitive Phrases
An 
infinitive 
is a verb form that is preceded by the word to and is used as a noun, an
adjective, or an adverb. If to precedes the base form of the verb, it is part of an infinitive,
not a preposition.
To fly in my own plane is one of the greatest thrills I have known. (infinitive as subject)
My father loves to drive through the country. (infinitive as direct object)
Our goal is to build twenty birdhouses by the end of the week. (infinitive as predicate
nominative.)
Are you ready to go? (infinitive as adverb)
An infinitive with its complements and modifiers is called an