he has left for three months

答案：C 根据for three months，可知应该用现在完成时态．for …是现在完成时的标志词．现在完成时态的构成：助动词have/has+过去分词．left是动词leave离开的过去式，是非延续性动词，不能和表示一段的时间状语for…连用，应该用be away from，表示离开多长时间了．即套用时态为has been away...

B 考查情景交际和现在完成时。“你叔叔在哪里？”“他去伦敦了。他已经离开三个多月了。”have gone to“去了某地还没回来”；have been to“去过某地”；leave是短暂性动词，不能与一段时间连用，要转换为be away。故选B。

而选项中的区别在于,A,B,C都表示一个动作,而D表示一个状态 因为for three months是个时间长 所以要选D

答案：D．根据关键词for three months可知，本句是现在完成时态，其构成为：have/has+过去分词，句中的动词应该是延续性动词，be away from是延续性动词，主语he是第三人称单数形式，所以助动词用has，故选D．

has been to和has gone to的区别有：意思不同、用法不同、侧重点不同。一、意思不同 1、has been to：意为“曾经去过某地”，现在已不在那里了。2、has gone to：意为“到某地去”，说话时该人不在现场。二、用法不同 1、has been to：当问到有没有去过某地时使用，例如：I has been to...

(4)用句型"时间+has passed+since..."表达原意，如上面两例中的第四种正确表达方式。3.终止性动词可用于现在完成时否定式中，成为可以延续的状态，因而可与表示一段时间的状语连用。如：He hasn't left here since 1986.I haven't heard from my father for two weeks.4.终止性动词的否定式与...

37. I have lived with them for three months. = I’ve lived with them ___ three months ___. 38. He has taught us computer science since 2000.  ___39. 改错:How long have you borrowed this book?40. 改错:She has been ill from Monday. 41. 改错:The train has left for five...

2. Alice has left for Paris for three months . (= Alice has left for Paris , intending to stay there for three months.)3. We are starting for Shanghai for two weeks. (= We are going to Shanghai , and we are planning to stay there for two weeks.)二、非延续性谓语动词...

(3)终止性动词现在完成时的否定式,已变成一种可以延续的状态,因此可以和表示一段时间的状语连用。 如:I haven't left here since 1997.自从1997年以来,我一直没有离开过这儿。(2)现在完成时常见两种句型:①主语+have / has been+for短语②It is+一段时间+ since从句例如:He has been in the League for ...