he can.”Р2.I can speak fluent English now , but I couldn’t last year.Р在肯定句中,表示客观可能性,并不涉及具体某事会发生,常用来说明人或事物的特征。要表达具体某事实际发生的可能性时,不用can,需用could,may,might。РAs a human being, anyone can make a mistake.РI’m confident that a solution can be found.РHe can be very forgetful sometimes.РI may stay at home this weekend.(实际可能性)РPeter e to join us.(实际可能性) РIt will be sunny in the daytime ,but it could rain tonight.(实际可能性)Р表示请求和允许。表示请求,口语中常用could代替can,使语气更委婉。РCan we turn the air conditioner on?РAny police officer can insist on seeing a driver’s license.РIn er, you can’t touch the ball with your hands.РCould you have her call me back when she gets home, please?РI wonder if I could just ask you to sign this.Р表示对现在的动作或状态进行主观的猜测,主要用在否定句和疑问句中。РIt can’t be easy caring for a man and a child who are not your own.
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