something have changed?语法对吗?还是something had change?

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something have changed?语法对吗?还是something had change?
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something have changed?语法对吗?还是something had change?
something have changed?语法对吗?还是something had change?

something have changed?语法对吗?还是something had change?
something have changed肯定错了
something had change 过去完成时
something has change现在完成时
something 只能看作单数