Pitch accent of 止まらないんだ


I'm confused on the pitch accent for the phrase 止まらないんだ.

I know that the pitch accent for 止まらない is 平板型 (とまらない{LHHHH}). From my own
experience, I think that the accent for 止まらないんだ looks like this
とまらないんだ{LHHHLLL}. However, OJAD tells me that the downstep should be at the い
position. So, it will look like とまらないんだ{LHHHHLL} instead.

Which one of these pitch accents is the correct one?




The correct accent is 止まらないんだ{LHHHLLL}. The drop comes from ＼んだ, but it moves
back for the vowel. OJAD’s Suzuki-kun is wrong (like it often is).

