He find some information that you can use in your article.
中,已經(jīng)有了賓語“some information"；that you can use in your article只不過是對(duì)”一些信息”作進(jìn)一步的說明而已.
如果用what而非that,賓語就不明確了.
如果要用what,就把"some information"刪除,變?yōu)椋?br/>He find what you can use in your article.其中"what you can use in your article"整個(gè)做find的賓語.意思是“他找到了能用在你文章中的東西”.
He used to sit for hours doing nothing in the boat.的意思是“他過去常常在船上坐上數(shù)個(gè)小時(shí),什么事情也不做.”
什么時(shí)候用doing nothing in the boat?就是在主語在做一件事情的時(shí)候（這就有了謂語）,還想表達(dá)他同時(shí)還在干些什么的時(shí)候用.