Can you help me figure out the が particle usage in this subordinate clause?

Japanese Language Grammar
21

I’m not following the connections you’re trying to make.

22

No. が as a nominaliser (i.e. like modern の) is completely dead and survives only in specific fossilised expressions like the one you mention.

3 Likes
23

Would the same phenomenon occur with words like 上手? Am I writing this correctly?

「私は泳ぐのが上手です。」
「他に誰が泳ぐのが上手ですか。」
「マキさんが泳ぐのが上手です。」