现在完成
网络释义
现在完成式 Present Perfect Tense ; Present Perfect
现在完成时的形式 Forms of the Present Perfect
现在完成时的含义 Meanings of the Present Perfect
现在完成进行式 Present Perfect Progressive ; present progressive
用于现在完成时 so far
现在完成进行时态 Present Perfect Continuous
现在完成时的被动语态 the present perfect passive voice ; has been kidnapped ; has been done
现在完成时的用法 Now when the complete usage ; Now completes when usage ; Present perfect usage
虚拟式现在完成时 Perfecto Compuesto del Subjuntivo
双语例句原声例句
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现在完成时在第8单元讲解。
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I have eaten是动词eat的现在完成时；I had eaten是过去完成时；I will have eaten是将来完成时。
'I have eaten' is the present perfect tense of the verb 'to eat', 'I had eaten' is the past perfect and 'I will have eaten' is the future perfect.
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这件事情是不是非要现在完成？
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Now we never completed the study so we never wrote it up, but we did find some interesting preliminary things.
现在研究尚未完成,所以还没写成论文,但我们发现了一些有趣的原始发现
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And he actually did this in the late 1800's, back before even all of the elements that we know today were discovered, really only about 60% or so, 70% were discovered then that we now know today.
他最终在十九世纪晚期完成了这一壮举，难能可贵的是,虽然我们现在已经发现了所有的元素，但在当时已知的元素只有我们现在知道,百分之六七十，在这种情况下。
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OK, so now we're going to do the same kind of experiment, but irreversibly. An irreversible adiabatic.
现在来在,不可逆的条件下，完成相同的实验。
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