Is my analysis correct that the following use of wh- question words and how is two clauses linked by a conjunction:
I don't understand || how/why/when/where he did it
here's || why I have a problem
Furthermore are these to be considered textual themes, while in
I don't know || what he did
I don't know || where he did it
I don't know || who did it
what, where and who would be ideational themes?