写出下列单词的过去式和过去分词：improve describe support develop 紧急！求大家快点帮帮忙！
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展开全部
improve：improved,improved
describe:described,described
support:supported,supported
develop:developed,developed
describe:described,described
support:supported,supported
develop:developed,developed
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展开全部
improved, improved
described, described
supported, supported
developed,developed
described, described
supported, supported
developed,developed
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展开全部
imprvoe-improved-improved
describe-described-described
support-supported-supported
develop-developed-developed
describe-described-described
support-supported-supported
develop-developed-developed
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