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现在完成时态标志性词语

yet already in the last five/few years for + 一段时间 since every never up to/till now so far Up to the present once recently lately 1.现在完成时用来表示现在之前已发生过或完成的动作或状态,但其结果却和现在有联系,也就是说,动作或状态发生在

已,已经,过,了,使用条件必须是表示现在.如果有过去的条件,就用过去完成时.如:他去过北京.he has been to beijing. 他已经完成了任务.he has completed his task already. 我昨天见到了汤姆.我们已有多年没见.i saw tom yesterday. we haven't seen each other for a long time.

1.一般现在时:sometimes,often,usually,always,regularly,generally,every day,once aweek,at present,nowadays, at the moment. 2.一般过去时: yesterday,last week,three days ago,in 1980 3.一般将来时: be going to, be to, be about to 4.过去将来时

现在完成时的标志词有以下这些:1、Already:用在肯定句中(be动词、助动词、情态动词之后,实意动词之前)常与yet进行转换.例如:I have already finished the work.我已经完成这项工作了. 改为否定句:I haven't finished the work yet.我还

since可以用主将从现,解释由于,既然.exp.Since you have so many things to do,i can do the homework by myself. already一般用茬句中,exp.I have already finish my homework. yet一般用茬句末,exp.I haven't finish homework yet. just跟now搭

1、一个动作发生在过去 并持续到现在并可能继续持续下去.i have lived here since i was born2、一个动作发生在过去对现在造成影响eddie has just eaten hobo's food3、到现在为止一个动作发生过多少次i have already read this book many times出现 already yet ever just never since recently for 用现在完成时 for+一段时间(延续性动词)

这句子里once做连词连接连个句子,做连词的once是一旦的意思,我想你的疑问是once做副词时翻译成曾经,你给的句子中once需要连接两个句子,不能做副词,只能做连词,如果是副词可以是过去时的标志.答案是will know ;gets 没错,在条件状语从句中,主句将来时,从句一般现在时.

现在完成时 have/has + done 现在完成时的被动语态 have/has+been done 现在完成时的标志性时间状语already , ever , never , yet , just , before, still , lately ,since , for a long time ,up to now, until,so far,in the last few years/weeks/mouths , till now,recently

第一部分:现在完成时表示过去发生或已经完成的动作对现在造成的影响或结果,也可表示过去已经开始,一直延续到现在的动作或状态.学习现在完成时,先从结构和句式开始: 构成:主语 + have / has + 过去分词 + 其他(当主语是第三人称

already:用在肯定句中(be动词、助动词、情态动词之后,实意动词之前)常与yet进行转换.例如:I havealreadyfinished the work.我已经完成这项工作了. 改为否定句:I haven't finished the work yet.我还没有完成这项工作.改为一般疑问句:

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