Helen does her homework after school. (改成否定句)
Helen _____ _____ her homework after school
正确答案及解析
正确答案
doesn’t do
解析
原句句意：海伦放学后做家庭作业。does 实义动词，该句是一般现在时态，主语是第三人称单数，改为否定句需加助动词 doesn't，原动词恢复原形，故答案为 doesn't；do。
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