Which of the following sentences is written correctly?
A When properly designed, an automobile can achieve great fuel efficiency.
B. When properly designed an automobile can achieve great fuel efficiency.
C. When properly designed, great fuel efficiency can be achieved by an automobile.
D. When properly designed great fuel efficiency can be achieved by an automobile.
Could swear I have seen this question before.
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To determine which of the following sentences is written correctly, we can analyze each option:
A. When properly designed, an automobile can achieve great fuel efficiency.
In this sentence, a comma is correctly placed after "designed" as it separates the introductory clause from the main part of the sentence. The rest of the sentence is grammatically correct.
B. When properly designed an automobile can achieve great fuel efficiency.
This sentence is missing a comma after "designed." Without the comma, the sentence becomes a run-on or a comma splice. Therefore, this sentence is not written correctly.
C. When properly designed, great fuel efficiency can be achieved by an automobile.
In this sentence, a comma is correctly placed after "designed." Also, the structure of the sentence is correct, with the subject "great fuel efficiency" followed by the verb phrase "can be achieved." Therefore, this sentence is written correctly.
D. When properly designed great fuel efficiency can be achieved by an automobile.
Similar to option B, this sentence is missing a comma after "designed." Without the comma, the sentence becomes a run-on or a comma splice. Therefore, this sentence is not written correctly.
In conclusion, the correct sentence is option A:
When properly designed, an automobile can achieve great fuel efficiency.