whether和if在引导不确定的从句中的用法区别，你们都记住了吗？<(￣︶￣)>
忘记了的今天再来回顾一下它们的区别吧~
当引导宾语从句时，whether和if都可以作引导词；
但是whether可用于句首引导主语从句，而if则不能。
回顾完之前的知识点，今天我们学习一个新的知识点。
那就是「疑问词引导的主语从句」。
我们可以先回忆一下英语中有一些常见的疑问词。
表“是否”的 whether/if （区别见上）
表“什么”的 when/where/why/who/which/how/what等
在学习疑问词引导的主语从句时，有几点需要注意：
1.疑问词引导的从句必须是陈述语序。
What will you choose is decided by yourself. （✖️）
What you will choose is decided by yourself. （✔️）
Where will the party be held is unknown. （✖️）
Where the party will be held is unknown. （✔️）
2.主语从句在整个句子中做主语时，主句的谓语动词一般用单数形式。
What you will do and how you will do it don’t matter to me. （✖️）
When and how we will go there haven’t been decided.（✖️）
When and how we will go there hasn’t been decided.（✔️）
3.what引导的主语从句，谓语动词一般与主句的表语或宾语一致。
What he gave me yesterday are a pencil and a book. （✔️）
What he lent to me yesterday is a lot of money. （✔️）
What he gives me are some books. （✔️）
What he saw in the sky are the stars. （✔️）
不知道大家有没有记住呢？那我们来开始小测试吧！ (o゜゜)o
小练习
__________ remains unknown to us.
A. What is her name
B. What name is she
C. What her name is
What he bought yesterday ____ some notebooks.
A. is
B. are
What I wanted ____ a few days’ rest.
A. is
B. are
考试真题
近年来，名词性从句出现的次数较多，下面选取三个例子：
When the delayed flight will take off depends on the weather. (高考，2014)
How we understand things has a lot to do with what we feel. (高考，2015)
Whoever makes the most beautiful kite will win the first prize in the Kite Festival. (高考，2017)
