all what i should do is to study hard.请问all what i should do

来源：学生作业帮编辑：作业帮分类：英语作业时间：2024/05/07 04:54:40

all what i should do is to study hard.请问all what i should do是什么从句?
是不是语法错了，不需要就all就成句啦？

all what i should do是定语从句.这个句子在整个句子中做主语.
all what=all the things that,what属于复合关系代词.
all the things是先行词,that是关系代词.
再问：此句中all是adj.？
另外：all i should do is to study hard. 中all是n.？正在分析这两个句子成分，谢谢
再答： all what i should do中的all是代词，它和what=the things that中的the things是同位语。
即all与the things位置与作用相同，意思一样，可以去掉它们其中的一个，也是一个完整的句子，句子的意思基本不变。

all i should do is to study hard. 中all是代词。
all做do的宾语，all后没有可被其修饰的名词，而宾语只能用名词、代词或可以充当名词的短语、句子充当，此句中的all就只能是代词，因其后没有它可以修饰的名词。

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