d you get up so early?Р (强调起床的动作已发生过了。)Р Who hasn't handed in his paper? Р (强调有卷子,可能为不公平竞争。)Р She has returned from Paris. Р 她已从巴黎回来了。Р She returned yesterday. Р 她是昨天回来了。Р He has been in the League for three years.Р (在团内的状态可延续)Р He has been a League member for three years.Р (是团员的状态可持续)Р He joined the League three years ago. Р ( 三年前入团,joined为短暂行为。)Р I have finished my homework now. Р ---Will somebody go and get Dr. White?Р ---He's already been sent for. Р句子中如有过去时的时间副词(如 yesterday, last, week, in 1960)时,不能使用现在完成时,要用过去时。Р (错)Tom has written a letter to his parents last night.Р (对)Tom wrote a letter to his parents last night. Р用于现在完成时的句型Р1)It is the first / second time…. that…结构中的从句部分,用现在完成时。Р It is the first time that I have visited the city.Р It was the third time that the boy had been late.
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