Active Sentences
In
active sentences, the thing doing the action is the subject of the sentence and
the thing receiving the action is the object. Most sentences are active.
[Thing
doing action] + [verb] + [thing receiving action]
Examples:
Passive Sentences
In
passive sentences, the thing receiving the action is the subject of the
sentence and the thing doing the action is optionally included near the end of
the sentence. You can use the passive form if you think that the thing
receiving the action is more important or should be emphasized. You can also
use the passive form if you do not know who is doing the action or if you do
not want to mention who is doing the action.
[Thing
receiving action] + [be] + [past participle of verb] + [by] + [thing doing
action]
Examples:
Examples
Of Articles Containing A Passive Sentences
Mapping the
chemical sequences for human DNA -- the chemical "letters" that make
up the recipe of human life -- is a breakthrough that is
expected to revolutionize the practice of medicine by paving
the way for new drugs and medical therapies.
Ninety-nine
percent of the human genome has been sequenced
and 3.21 billion letters of genetic code have
been assembled by Celera.
In the final
step, each gene and its function must be identified.
Scientists will look for the genetic variations in people -- variations that
could be the cause of countless diseases.
That step is expected to take several years to complete.
However, scientists said doctors one day would be able to study a person's
genetic profile, determine his susceptibility to various diseases, and design a
course of treatment to prevent illness.
Despite the
potential for medical advancements, many Americans are
divided over the implications of the genome project.
Source :
