Sometimes I think it's more obvious when to use 〜的 as a suffix for example 国家
"nation/state" vs 国家的 "national", but in a lot of other cases I think the
distinction might be more blurred, and they frequently translate to the same
word in English.

For example (probably not a complete list):

  * 一時（的）"temporarily"
  * 自動（的）"automatic"
  * 国際（的）"international"
  * 理想（的）"ideal"
  * 一般（的）"general"
  * 直接（的）"direct"
  * 絶対（的）"absolute"
  * 標準（的）"standard"

Is there a common pattern where to use/not use 的 on the end of these kinds of
words? For example, in the following sentences taken from the Tanaka corpus,
is there any difference between their usage, and can they be interchanged?

> そのような国際協力が素晴らしい成果を挙げた。  
>  Such international cooperation was productive of great results.
>
> 京都は景色が美しい点で国際的にも有名です。  
>  Kyoto is internationally famous for its scenic beauty.
>
> 10年前だったら彼の理論も一般的に認められるということはなかったでしょう。  
>  Ten years ago his theory would not have been generally accepted.
>
> この教会は教会一般の大きさからすると大きなものではない。  
>  This church is not a big one, as churches go.

Does 的 always make a noun an adjective or are there cases where it's used for
other purposes? (For example there seems to be
[直接的に](http://eow.alc.co.jp/search?q=%E7%9B%B4%E6%8E%A5%E7%9A%84%E3%81%AB) as
well as [直接に](http://eow.alc.co.jp/search?q=%E7%9B%B4%E6%8E%A5%E3%81%AB), and
they're both listed as `adj-na` in Edict, and
[絶対に](http://eow.alc.co.jp/search?q=%E7%B5%B6%E5%AF%BE%E3%81%AB) and
[絶対的に](http://eow.alc.co.jp/search?q=%E7%B5%B6%E5%AF%BE%E7%9A%84%E3%81%AB)
which I think have different usages etc).
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question
adjectives suffixes na-adjectives
Is there a pattern to the usage of 〜的 on the end of words?
I think the best place start an answering your question is by addressing the
differnce between 直接的に/直接に and 絶対/絶対的に.

In both cases the ~的 adverb is used to describe more abstract matters:

Compare:

> ～と直接に|eyeball-to-eyeball with ～について自身で直接に学ぶ |learn at **first hand** about

To:

> 直接的に in a direct **way** /in a straightforward **fashion** /in a
> straightforward **manner**

Or,

Compare:

> 絶対にありえん話だ。|That would be **obviously** impossible. 絶対にあり得ないね。| **Never** in
> a thousand years.

To:

> 絶対的には| in absolute **terms**

If you go through all those terms in SpaceALC it is quite easy to come up
exceptions to challenge this but [一般的に!!!] I suspect this is the best "rule of
thumb" you can get when it comes to translation and, as you say, it is
blurred, "not immediately obvious" or at best idiomatic.

However if we look at the examples you give it is comforting to see that (I
think) the difference applies equally in both English and Japanese:

Where as:

> **International cooperation** is an absolute term for cross-border
> cooperation.
>
> **Internationally famous** is more relative term to describe a point on a
> continium spanning from "unknown outside one country" to "known by everybody
> in every country".

Or in the second case (一般／一般的）there seems to be a concrete measure of the
normal size for a church but the extent to which an idea will be accepted and
adopted may be more elastic.
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answer