Dative subjects


I just finished reading
[this](http://roa.rutgers.edu/files/324-0699/roa-324-woolford-1.pdf) paper,
which describes the situations in which Japanese allows a dative subject and a
nominative object. For example, the verb 分かる can be used like this:

> 彼に英語が分かる

"彼" is the subject but is marked with "に" instead of "が", and similarly "英語",
the object, is marked irregularly with the nominative particle "が" instead of
the usual "を". According to the paper, this happens in Japanese when a verb 1)
licenses this case marking and 2) the verb is transitive (there is an object).
There are two parts to my questions:

1)The 可能形 licenses dative subjects:

> 「彼に英語が話せる」

but not

> ｢彼に英語が話す」

This is still ruled out for intransitives, so 5a in the paper shows that you
cannot say 「*赤ちゃんにもう歩ける」. Does this change if we add another argument such as
a location? Can I say 「人間にはその道が歩けない」 (let's say it's covered in lava or
something).

  2. The paper also mentions that there are exceptions to this rule, one of them being certain kinds of questions. Can anyone think of a Japanese question with a transitive verb or a verb that doesn't normally allow a dative subject, but which has a dative subject anyway?




  1. >Can I say 「人間にはその道が歩けない」   
Yes I think you can say that. Maybe you can also say 人間にはその道は歩けない/人間にその道は歩けない.  

  2. Hmm... Would it be something like... you can say 君に(この車が)運転できるかい? but not 僕に運転できます。?? 私には耐えられない/私に耐えられるだろうか but not 私に耐えられます。?? or maybe 私にやって行けるだろうか/私にはやって行けない but not 私にやって行けます。?? 

