现在完成时什么时候用yet just before ever

来源：学生作业帮编辑：作业帮分类：英语作业时间：2024/05/05 19:25:37

yet表“尚未”.He has not yet finished his homework.
yet表“尚未”时,不总是出现在完成时中.例如The real challenge is yet to come.(真正的挑战还没有到来).这句话暗含的意思是“真正的挑战”总会到来,只是时间问题.
yet另一个意思是“但是”,表示比but稍弱的转折.
just表“刚刚”.He has just finished his homework.
但是大多数时候,just使用一般过去式就完全足够了,比如He just finished his homework.
just作副词还有“仅仅,只要”的意思；形容词表示“公正的”.
before大多数时候出现在将来时,一般现在时,一般过去式和过去完成时.
He will finish his homework before 8.00.
If he finishes his homework before 8.00,he will be rewarded by his mom.
He finished his homework before 8.00.
He had finished his homework before his mom went mad at him.
ever表示“从来；永远”.一般以这种形式出现在一般/过去完成时中：
That is the best show he has ever seen.
其他情况下,ever可以用在各种时态：
He will never ever trust her again.(强调ever,类似于肯定形式的never)
He thinks himself to be ever correct.(代替always)

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