American here. Ask me anything.

42 ：名無しさん＠英語勉強中 ：2018/04/15(日) 17:52:42.19 ID:M/NOrTSV0.net

>>39
You still don't seem to understand what he said.
He clearly explained the grammatical rationals and also kindly make it clear that it is a reply to other's post.

Frankly speaking, every intermediate level learners can understand what he says with ease.