过去时是动词是加了ed等的形式,
完成时是 have或has done 的形式
第一句是过去完成时,有by表示直到10点才到,暗示到的晚了,对现在造成了一定的影响。
第二句是一般过去时,只是说了过去发生的一个事实,不带任何感情色彩,对现在也没有任何影响,
翻译:Xiaoming has gone to school.
Xiaoming had gone to school.
Xiaoming went to school.
第一个是完成时,第二个是过去时。
现在完成:xiaoming has gone to schoo.
过去式:xiaoming went to school.
过去完成:xiaoming had gone to shchool
1Xiao Ming has gone to school
2Xiao Ming had gone to school
3Xiao Ming went to school
完成时(过去完成时):They had arrived at the station by ten yesterday.
过去时:They arrived at the station at ten yesterday.
现在完成时是 have(第1,2人称)/has(第3人称单数)+过去分词
过去完成时是 had+过去分词
小明去上学:
现在完成:Xiao ming has gone to school.
过去完成:Xiao ming had gone to school.
过去式:Xiao ming went to school.
第一句是过去完成时(标志:had arrived)
第二句是一般过去时(标志:arrived)
小明去上学:
现在完成时:he has gone to school.(标志:have/has done)
过去完成时:he had gone to school.(标志:had done)
一般过去时:he went to school. (标志:动词用过去式)
They had arrived at the station by ten yesterday.这句是过去完成时
They arrived at the station at ten yesterday.这句是一般过去时
不同的时态一般会搭配不同的时间状语使用。
过去完成时表示在过去某一时刻以前已经开始并一直延续到这一刻、或是在此刻前已经完成的动作,其格式是 had+动词的过去分词,如:Xiaoming had gone to school when his mother got home. 这句中,his mother got home是过去的某一时刻,而小明在他妈妈到家前就已经去学校了,所以在此句中小明去学校的动作是过去的过去发生的,用过去完成时。
一般过去时是表示在过去一段时间内经常性、习惯性动作或是表示动作、状态存在于现在之前,其格式是将动词改成过去式,如:Xiaoming went to school just now. "just now"意为“刚才”,用于一般过去时中,"went"是"go"的过去式。
现在完成时是表示过去发生的对现在造成影响的动作或表示过去某时间开始一直延续到现在的动作,其格式为 have/has+动词的过去分词,如:Xiaoming has gone to school already. "already"意为“已经”,用于现在完成时中,小明是第三人称单数,用"has";"gone"是"go"的过去分词。