“英语怎么改肯定句”的一些常见方法和要点：
一般现在时
如果原句是否定句，有 be 动词（am/is/are）或情态动词（can/could/must 等），直接去掉否定词 not 即可。例如：“I am not a student.” 改为肯定句就是 “I am a student.” ；“He can't swim.” 改为 “He can swim.”
一般过去时
若有 was/were 或情态动词的过去式（could/might 等），同样去掉 not。如：“They weren't happy.” 改肯定句为 “They were happy.”
实义动词的句子
否定句中如果借助了助动词 do/does/did 加 not 来构成否定，改肯定句时去掉 not，同时根据时态和主语，将助动词还原为实义动词的相应形式。例如：“She doesn't like apples.” 改成肯定句是 “She likes apples.” ；“They didn't go to school yesterday.” 变为肯定句是 “They went to school yesterday.”
需要注意的是，改肯定句时要确保句子的语 确，并且意思表达清晰。同时，要根据句子的时态、语态和主语等情况进行相应的调整。
