主要分为三类：
名词+that
名词+to do sth
名词+of+wh-
①
转述动词，其对应的名词可以+that，
that通常不省略
：
advise, advice
warn, warning
conclude, conclusion
decide, decision
allege, allegation
指责，宣称
explain, explanation
indicate, indication
表明，显示，暗示
observe, observation
recommend, recommendation
speculate, speculation
猜测，推断
suggest, suggestion
announce, announcement
宣告
acknowledge, acknowledgement
承认
argue，arguement
state, statement
动词、名词同形的：
answer
comment
claim
forecast
guarantee
promise
reply
threat
②
转述名词+to do sth
accept one's invitation to do sth
give sb encouragement to do sth
make the decision to do sth
get the instruction to do sth
follow the order to do sth
make the promise to do sth
accept the recomendation to do sth
refusal to do sth
threat to do sth
warning to do sth
③
名词+of + wh-
the question/issue/problem of wh-
the explanation of why
the discussion of when-
as to表示concerning，和...有关
：
advice as to sth = advice on sth
discussion as to sth = discussion of sth
instruction as to how to do sth= instruction about how to do sth
这里有一个小技巧：
如果你不确定这类名词后面应该和哪个介词搭配，就可以用as to
。
