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Message: <blockquote data-quote="IndrajithGamage" data-source="post: 28680247" data-attributes="member: 581741">Wrong, and it shouldn't be. You can use changed in a passive voice sense, but it's a little weird without specifying who or what did that change. (perhaps you understand the issue better with a sentence like "My hair has been cut over the years", it's grammatically valid, but we usually don't use it that way.)A much better way to say your second sentence would be something like "Technology has been undergoing changes over the years", or "Technological changes have been happening over the years". Or if you really want to use the same structure, you can use "Technology has been changing over the years". The meaning is slightly different, but it's grammatically and semantically okay.</blockquote>

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