Grammar explanation for '...ことができなくなります'


Is 'できなく' converted from 'できない'? I've learned adj. '..い' can convert to '..く'
in this case. Does verb's 'ない' form also have such transformation?




> Does verb's 'ない' form also have such transformation?

Yes. ない behaves just like an i-adjective. And the continuative form is なく just
as you'd expect.

As you may already know, to say 'becomes _adjective_ ' you replace the い of an
i-adjective with く and the な of a na-adjective with に, then add なる.

So できる (can do) -> できない (unable to do) -> できなくなる (become unable to do).




> Does verb's 'ない' form also have such transformation?

Yes. ない behaves just like an i-adjective. And the continuative form is なく just
as you'd expect.

As you may already know, to say 'becomes _adjective_ ' you replace the い of an
i-adjective with く and the な of a na-adjective with に, then add なる.

So できる (can do) -> できない (unable to do) -> できなくなる (become unable to do).

