整理 F 「〜ばかり」のいろいろな使い方 教科書 p.80
Ways to use 〜ばかり
接続：N・Vて・Vた・V辞書形 + ばかり
not only… but also…. Expanding scope: the article in the following clause is added to the article stated in the previous clause.
注意 / Note：Check the correct front form, subject and level of politeness; Don't just translate word for word.
比較 / Compare：Compare with structures in the same lesson to choose according to function in the whole sentence. Same 課: 〜ばかり／〜てばかりいる／〜ばかりだ／〜たばかりだ — these models are often mistaken for each other, read the 接続 line carefully and then decide.
弟はゲームばかりしています。
Little brother only plays games.
今、帰ってきたばかりです。
I just got back.
この腕時計は心拍数ばかりでなく、睡眠時間も測れます。
This watch not only measures heart rate but also sleep time.