What counts as a relative clause

English

I made up these names, just so there could be names, and have tried to include "subject" and "object" versions of each.

• I saw him eating fish
• I heard him singing

• I #know/??saw his eating of fish
• I #know/#heard his singing

• I know/saw (that) he was eating fish
• I know/heard (that) he sang

• I know/saw what/which one/how many/how often/etc he ate
• I know/heard why/how/etc he sang

Appositional

• The man, eating his meal, …
• The man, spotted by the reporter, …

Restrictive

• The man eating his meal
• The man spotted by the reporter