あ、ごめん、何か言い掛けてたよね?
a, gomen, nanika iikaketeta yo ne?
Oh sorry, you were starting to say something, right? casual
彼は何かを言い掛けましたが、途中でやめました。
kare wa nanika o iikakemashita ga, tochuu de yamemashita.
He started to say something, but stopped partway through. neutral