1.目前完成时不可以单独与准确时间连用，(如表示过去的时间状语）如yesterday(morning、afternoon),last(morning、afternoon)等，除非与for,since连用.2.目前完成时总是同表示不确定的过去时间状语连用,如already（一定）, yet（否定，疑问）, just, before, recently,still, lately等:He has already obtained a scholarship.I havent seen much of him recently (lately).We have seen that film before.Have they found the missing child yet ?3. 目前完成时常常与表示频度的时间状语连用,如often, sometimes, ever, never, twice, on several occasion等:Have you ever been to BeijingI have never heard Bunny say anything against her.I have used this pen only three times. It is still good.George has met that gentleman on several occasions.4. 目前完成时还总是可以同包含目前时间在内的时间状语连用,如now, up to these few days/weeks/months/years, this morning/week/month/year, just, today, up to present, so far等:Peter has written six papers so far.Man has now learned to release energy from the nucleus of the atom.There has been too much rain in San Francisco this year.The friendly relations and cooperation between our two countries have been enhanced in the past few years.Up to the present everything has been successful.5. 目前完成时还可以用来表示过去的一个时间到目前这期间内重复发生的动作.We have had four texts this 百度竞价推广ester.6.目前完成时的完成使用方法目前完成时的完成使用方法指的是动作发生在过去某一时刻并已结束，但该动作对目前产生了影响，与目前状况具备因果关系。比如：He has turned off the light.他已把灯关了。(动作结束于过去，但说明的是目前的状况--灯目前不亮了。)目前完成时完成使用方法的特征是动作不延续，因此，该时态只能与表示不定的过去时间状语(如：already，yet，before，recently等)、频度时间状语(如：never，ever，once等)、包含目前时刻在内的时间状语(如：this morning ／ month ／year...，today等)连用。比如： Have you found your pen yet？你已找到你的钢笔了吗？7.目前完成时的没有完成使用方法目前完成时的没有完成使用方法指的是动作开始于过去某一时刻，一直延续到目前，或可能还要继续下去。比如：He has lived here since 1978.自从1978年以来，他一直住在这儿。(动作起始于1978年，一直住到目前，可能还要继续住下去。)I have been in the army for more than 5 years.我在部队已经呆了五年多了。(动作开始于5年前，一直延续到今天，大概还要继续下去。)此种使用方法的句中常需一个表示一段时间的状语(由since或for引导)，或表示与目前时刻相连的时间状语(如：up to now，so far)等。比如：I have heard nothing from him up to now.到现在为止我没他的任何消息。注意：(1)目前完成时的没有完成使用方法只适用于延续性动词，不可用于终止性动词，即瞬间完成或延续时间非常短的动词。如：come，go，arrive，leave，join，become，die等。8.一段时间+has passed+since从句9. 目前完成时常和短语 up to now /till now, so far (意思是从过去某一确定的时间一直延续到目前.)Up to/till now hes read many story books. 到今天他已读过好多故事书。Ive been to New York three times so far. 到今天我已到纽约去过三次。10 has gone (to),has been (to), has been (in) 有什么区别gone:去了没回been to :去过been in：呆了很长时间10.不可以与when连用
