John 20:14

Καὶ ταῦτα εἰποῦσα ἐστράφη εἰς τὰ ὀπίσω, καὶ θεωρεῖ τὸν Ἰησοῦν ἑστῶτα, καὶ οὐκ ᾔδει ὅτι Ἰησοῦς ἐστι.

RBT Greek Interlinear:

Strongs 3778; Tauta; Ταῦτα; these ones; DPro-ANP

Strongs 2036; eipousa; εἰποῦσα; she who has said; V-APA-NFS

Strongs 4762; estraphē; ἐστράφη; she turned; V-AIP-3S

Strongs 1519; eis; εἰς; into; Prep

Strongs 3588; ta; τὰ; the; Art-ANP

Strongs 3694; opisō; ὀπίσω; back; Adv

Strongs 2532; kai; καὶ; and; Conj

Strongs 2334; theōrei; θεωρεῖ; is looking attentively; V-PIA-3S

Strongs 3588; ton; τὸν; the; Art-AMS

Strongs 2424; Iēsoun; Ἰησοῦν; Salvation; N-AMS

Strongs 2476; hestōta; ἑστῶτα; he who has stood ready; V-RPA-AMS

Strongs 2532; kai; καὶ; and; Conj

Strongs 3756; ouk; οὐκ; not; Adv

Strongs 1492; ēdei; ᾔδει; did see; V-LIA-3S

Strongs 3754; hoti; ὅτι; that; Conj

Strongs 2424; Iēsous; Ἰησοῦς; Salvation; N-NMS

Strongs 1510; estin; ἐστιν; is; V-PIA-3S

RBT Translation:

Looking at the Ones Behind

She who has spoken these ones twisted around into the ones behind, and she is gazing attentively at the Salvation, he who has stood ready, and she has not perceived that he is Salvation.^122a

LITV Translation:
And saying these things, she turned backward and saw Jesus standing, and did not know that it was Jesus.

ESV Translation:
Having said this, she turned around and saw Jesus standing, but she did not know that it was Jesus.

Footnotes

122a

ἐστιν is third person singular present tense "he/she is being." The gender depends on the nouns, subjects of the sentence. 

ᾔδει is a word meaning "to see/realize, understand, perceive. The aforementioned word θεωρεῖ "she is gazing/looking attentively" has the sense of "beholding, partaking, experiencing, discerning, ascertaining" which leaves the verse sounding contradictory. She is seeing/discerning Salvation, but is not seeing that he is Salvation? ᾔδει is not the primary word for "to know" but rather "to see" with the eyes. It is also in the past tense. Why do we have a past tense "she has not seen" coupled with a "is being"?