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for example.
she lived to be ninety
what does that sentence mean?
Is it meaning of "she lived in order to be ninety" or "she lived and just became ninety"?
I have learned it as she lived and just became ninety. but I do not understand why.
infinitive used as adverb has the intention, but I have learned that is "result" so she lived and finally she became ninety years old. that is what I have learned. could you explain why it has meaning of result?
It's an idiom, and therefore attempts to parse it will be frustrating. In N American English, the statement means that she has lived until reaching the age of 90. In the absence of additional information, the statement implies that she died before reaching the age of 91.
