状態・変化N3
〜ばかりだ
goes on increasing (bad trend)
Structure
V-辞書形 + ばかりだ
Explanation
Indicates that a (bad) situation keeps worsening, "goes on increasing". Attaches to the dictionary form + ばかりだ.
Examples
問題は複雑になるばかりだ。
The problem keeps getting more complicated.
空気の汚染はひどくなるばかりです。
The air pollution keeps getting worse.
Note
ばかりだ marks a one-way worsening trend, close to 一方だ.