Question

which可以引导主语从句吗？

The result of the match has taught me that, whatever the outcome is, which counts is that we have tried our best.这个which引导主语从句没有错吧？

Answer 1

which counts is that we have tried our best 是定语从句，which 是关系代词，指代 the result of the match，谓语动词 counts 与 matters 同义；同时，which counts 又是嵌套在定语从句中复合句的主语，所以 which 又兼引导主语从句的连词。

比赛的最终结果告诉我，无论结果如何，重要的是我们已经尽了自己最大的努力。

Answer 2

if可以引导主语从句吗?
answer:可以,但不能用于句首."if"所引导的主语从句要放在句尾,在句首用形式主语"it"替代"if"引导的主语从句.
补充:
"whether"与"if"都可以做“是否”讲引导名词从句,其区别如下
if
作"是否"讲时
1.不能用在句首
2.不能引导主,表,同从句
3.可以引导宾语从句,但不用在介词之后
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Answer 3

The result of the match has taught me that, whatever the outcome is, which counts is that we have tried our best.
The result of the match has taught me that which counts is that we have tried our best.
把whatever从句拿走，得知这个which引导的不是主语从句，而是定语从句。
that是先行词。（引导词that省略了。that which可用what替代。）
比赛的结果让我明白，无论结果如何，重要的是我们都已经尽力了。

Answer 4

what引导主语从句,what可以在从句中充当主语,宾语成分which 引导主语从句,意思为哪一个,哪一些,一般后面需要紧跟名词,做具体说明是什么东西

追问

所以要换成what吗？

Answer 5

which是连接代词完全可以，但要根据实际情况而定。