偶然看到博客上一篇关注what+in这一结构。初学英语人士容易对此结构造成误解，以为what可以引导关系从句。其实，本人曾经也关注过这已结构，不过其中的介词不仅仅是in还有其它介词。从语料库里面查询了一下，what后搭配介词，构成宾语从句的用法不少。以下来自BYU 的COCA即当代美国英语语料库。检索的时候what作为关键词，其搭配为左边第一个（L1），选取了比较靠前的介词搭配粘贴于此以供进一步探讨。

FREQ
1		OF	70940	https://corpus.byu.edu/coca/k.jpg
2		ABOUT	34678	https://corpus.byu.edu/coca/k.jpg
3		TO	27849	https://corpus.byu.edu/coca/k.jpg
4		FOR	19900	https://corpus.byu.edu/coca/k.jpg
5		ON	19751	https://corpus.byu.edu/coca/k.jpg
6		IN	18153	https://corpus.byu.edu/coca/k.jpg
7		WITH	13526	https://corpus.byu.edu/coca/k.jpg
8		AT	11106	https://corpus.byu.edu/coca/k.jpg
9		FROM	10132	https://corpus.byu.edu/coca/k.jpg
10		BY	5960	https://corpus.byu.edu/coca/k.jpg
11		LIKE	3402	https://corpus.byu.edu/coca/k.jpg
12		INTO	3040	https://corpus.byu.edu/coca/k.jpg
13		OVER	2552	https://corpus.byu.edu/coca/k.jpg
14		BETWEEN	2064	https://corpus.byu.edu/coca/k.jpg