N1Grammar- studying differences between similar expressions

(2016-02-17, 4:31 pm)PotbellyPig Wrote: I already superficially studied grammar through N1 and beyond.  I read books with fairly ease.  But I was studying the Kanzen Master N1 Grammar workbook and I'm getting confused between the subtle differences between similar expressions i.e. んがため and べく.  There are notes that explain some the points in Japanese but they sometimes don't hit home.  Are there any other resources that would be helpful?  Workbook or otherwise?  To get a multiple choice question and pick out the slight difference between similar expressions sometimes seems like a hard task.  Sometimes the differences are clear like a negative expression always follows or always an action but other times.....

(2016-02-18, 11:18 pm)rich_f Wrote: Also good for disambiguation, Nihongo no Mori!
https://www.youtube.com/user/freejapanes.../playlists

I like どんなとき as a quick n' dirty reference, but I have to admit that when I'm totally lost, I go to 日本語文型辞典 for help. Also, くらべてわかる日本語表現文型辞典 is pretty useful, too.

Yeah kanzen master  n1 is really useful but so confusing for the similar points. Especially the first chapter lol. I think i've bought or tried nearly all grammar books and can say that the ones recomended above are the best for helping with comparisons, especially the くらべてわかる one. It has a workbook available to buy aswell but never used them before. 
 日本語文型辞典 is the most thorough in number of grammar points. 

I have どんなとき but I find it doesn't really explain the differences well and just uses similar explanations for every point.
The Dictionary of B/I/A Japanese Grammar are the ones I use the least as there is just too much information that is quite overwhelming. 
For english translations, these two are good, but I find it better to use the english translation and explanation from renshuu.org.

edit: Nearly forgot,
This site is great also
http://jn2et.com/JLPT.html#%E6%96%87%E5%...6%E3%81%91