/>空格后面有much相随,所以用how 进行提问,
no matter how much = however much
after 后面用what 引导的宾语从句,what 在宾语从句中主语
再问: 那个what指代什么?
再答: 这里的what 没有特殊指代,其实: after what seemed half an hour he came out 就等于 it seemed half an hour later, he came out it 和 what 都只是句子结构的一部分,不实际指代什么。