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一、CAN的多元含义1. 表达“能力”层面:CAN用来描述个体在体力、知识、技能等领域的潜能,如“能够”、“会”。其过去式为COULD,用以表达过去的才能。CAN'T和COULDN'T则分别代表“不能”和“不会”的含义。
示例:Jim can speak Chinese fluently. (吉姆能流利地说中文。)
这位小女孩在只有三岁的时候就已经能写字了。(The little girl could write when she was merely three years old.)
2. 暗示“可能性”:CAN在否定句和疑问句中表示推测,“不可能”常由can't体现。
David can't possibly be at home. (戴维不可能在家。)
3. 表现许可或请求,与MAY同义,即“可以”之意。
"May I help you?" 的另一种表述:Can I lend you a hand? (我能帮你吗?)
"Will you attend my birthday party?" 可转换成:Can you make it to my birthday bash? (你能来参加我的生日派对吗?)
二、CAN的运用规则1. 肯定句构造:主语 + can + 动词原形 + 其他成分。
例如:I can swim competently. (我擅长游泳。)
2. 转换为否定句:主语 + can't/cannot + 动词原形 + 其他成分。
比如:Swimming is not within my abilities; hence, I can't swim. (我不擅长游泳,所以我不会游泳。)
3. 构建一般疑问句:Can + 主语 + 动词原形 + 其他成分 + 问号。
示例询问:Are you capable of swimming? (你会游泳吗?)
肯定答复:Yes, indeed! I can. (是的,我会。)
否定回复:Not quite, I can't. (不,我不会。)
询问技能提问:What skills do you possess? I am able to sing, but alas, dancing isn't my forte. (你会做什么?我会唱歌,但我不会跳舞。)
复合选择疑问句呈现:Can you either sing or dance? My ability lies in dancing. (你会唱歌还是跳舞?我会跳舞。)