i am trying to find a knife ___this pencil A which to sharp with B to sharpen选哪个

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i am trying to find a knife ___this pencil A which to sharp with B to sharpen选哪个
i am trying to find a knife ___this pencil A which to sharp with B to sharpen选哪个

i am trying to find a knife ___this pencil A which to sharp with B to sharpen选哪个
选B to sharpen
which 是用在定语从句的引导词,楼主的句子后面只跟了一个名词this pencil,不需要从句,如果一定要用which,可以说:I am trying to find a knife which sharpens this pencil.

选B

B to就是表示 削铅笔的目的~
如果用which 句子应该这么写 i am trying to find a knife which is to sharp with this pencil~

to sharpen
充当目的状语