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Possible Duplicate:
“Is become” vs “has become”

This is a famous quote from J. Robert Oppenheimer after the successful detonation of the first nuclear weapon. The quote comes from the Bhagavad Gita, a sacred Hindu scripture.

This quote has bothered me since I first read it. Is it grammatically correct to say Now I am become death? Shouldn't the quote say Now I have become death or just Now I am death?