A.T. Robertson Commentary John 14:25

"These things have I spoken unto you, while [yet] abiding with you." — John 14:25 (ASV)

Have I spoken (λελαληκα). Perfect active indicative of λαλεω, for permanent keeping (τηρεω verse 23).

While yet abiding with you (παρ' υμιν μενων). Present active participle, no "yet" (ετ) in the Greek, "while remaining beside (παρ') you" before departing for the coming of the other Paraclete.