iMyself wrote:
But, my question is: WHY not B. B makes parallelism to me!
B. NOT (tag)+CAUSED (verb)+by+something....................BUT (tag)+ARE (verb)+by+Something
Indicate parallelism to each other.
Hi iMyself, the short answer is thatcaused is not used as averb here, but as aparticiple .
An easier way would be to do aXYZ Analysis (as per our bookSentence Correction Nirvana ). With B, the structure would be:
Recently physicians have determined that stomach ulcers are not caused by stress, alcohol, or rich
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