Having been used for a long time,the computer needs repairing.1 Having been used for a long time,the computerneeds repairing.2 To have been used for a long time,the computerneeds repairing.3 Used for a long time,the computerneeds repairing.三个哪

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Having been used for a long time,the computer needs repairing.1 Having been used for a long time,the computerneeds repairing.2 To have been used for a long time,the computerneeds repairing.3 Used for a long time,the computerneeds repairing.三个哪

Having been used for a long time,the computer needs repairing.1 Having been used for a long time,the computerneeds repairing.2 To have been used for a long time,the computerneeds repairing.3 Used for a long time,the computerneeds repairing.三个哪
Having been used for a long time,the computer needs repairing.
1 Having been used for a long time,the computer
needs repairing.
2 To have been used for a long time,the computer
needs repairing.
3 Used for a long time,the computer
needs repairing.
三个哪个是对的?why

Having been used for a long time,the computer needs repairing.1 Having been used for a long time,the computerneeds repairing.2 To have been used for a long time,the computerneeds repairing.3 Used for a long time,the computerneeds repairing.三个哪
第一个,原因两点:1 被动 2明显的完成意,对现在造成影响(看后边)

1是对的
Having been used for a long time= (As) the computer has been used for a long time
表示现在完成时状态,2和3的用法都不能表达句子需要用完成时的要求,因此不对。2不也是不定式的被动完成式么?为什么这里只能用现在分词的被动完成式?分词短语一般表示已经完成或做过的 不定式短语一般表示将来要做的。...

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1是对的
Having been used for a long time= (As) the computer has been used for a long time
表示现在完成时状态,2和3的用法都不能表达句子需要用完成时的要求,因此不对。

收起

选1
电脑是被人用,不是电脑自己用自己,所有要用被动语态,be+动词过去分词,排除3
到现在为止电脑已经被用很长时间了,所有需要修,用现在完成时态,have/has+动词过去分词,排除2,2中to表示目的,语意不通

第一个

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