Exercise 5

What about the negative and interrogative?


Let’s work on tranformations!

To this point in the topic we have analyzed different aspects of the passive voice, for example the use of the verb to be, the importance of the participle of the verbs. We have also worked on identification of passive and active voice, and identification of the tense in passive voice sentences. You definitely know a lot about it!

We have discussed different inventions, in this exercise we will talk about important discoveries.

Exercise

Instructions: read the following active voice sentences. Choose the appropriate passive voice.

1. Unknown cavemen discovered fire
a) Fire is discovered by unknown caveman.
b) Fire was discovered by unknown caveman.
Correct.
Incorrect.
2. Pfizer Company discovered by accident the effects of the Viagra pill.
a) The effects of the viagra pill were discovered by Pfizer Co. by accident.
b) The effects of the viagra pill was discovered by Pfizer Co. by accident.
Correct.
Incorrect.
3. Leo Baekland from Belgium produced the first plastic in 1907.
a) The first plastic is produced by Leo Baekland in 1907.
b) The first plastic was produced by Leo Baekland in 1907.
Correct.
Incorrect.
4. Thousands of people use sacharine everyday to sweeten coffee or tea.
a) Sacharine are used everyday to sweeten cofee or tea by thousands of people.
b) Sacharine is used everyday to sweeten cofee or tea by thousands of people.
Correct.
Incorrect.
5. Percy Spencer invented the modern microwave oven.
a) The modern microwave oven was invented by Percy Spencer.
b) The modern microwave oven is invented by Percy Spencer.
Correct.
Incorrect.
6. People heat food in the microwave oven everyday.
a) Food is heated in the microwave oven everyday by people.
b) Food was heated in the microwave oven everyday by people.
Correct.
Incorrect.
7. Wilhelm Röntgen discovered X-rays in 1895
a) X-rays was discovered in 1985 by Wilhel Röntgen.
b) X-rays were discovered in 1985 by Wilhel Röntgen.
Correct.
Incorrect.
8. Charles Goodyear found the importance of vulcanized rubber.
a) The importance of vulcanized rubber was found by Charles Goodyear.
b) The importance of vulcanized rubber were found by Charles Goodyear.
Correct.
Incorrect.
9. People use vaseline to cure cuts and burns.
a) Vaseline is used by people to cure cuts and burns.
b) Vaseline was used by people to cure cuts and burns.
Correct.
Incorrect.
10. Robert Chesebrough discovered the use of a waxy substance called Vaseline.
a) The use of a waxy substance called vaseline was discovered by Robert Chesebrough.
b) The use of a waxy substance called vaseline were discovered by Robert Chesebrough.
Correct.
Incorrect.

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