Verse Comparison: 1 John 2:13
American Standard Version
I write unto you, fathers, because ye know him who is from the beginning. I write unto you, young men, because ye have overcome the evil one. I have written unto you, little children, because ye know the Father.
Amplified® Bible
I am writing to you, fathers, because you have come to know (recognize, be aware of, and understand) Him Who [has existed] from the beginning. I am writing to you, young men, because you have been victorious over the wicked [one]. I write to you, boys (lads), because you have come to know (recognize and be aware) of the Father.
Contemporary English Version
Parents, I am writing you, because you have known the one who was there from the beginning. Young people, I am writing you, because you have defeated the evil one. 
Darby English Version
I write to you, fathers, because ye have known him [that is] from the beginning. I write to you, young men, because ye have overcome the wicked [one]. I write to you, little children, because ye have known the Father.
Good News Bible
I write to you, fathers, because you know him who has existed from the beginning. I write to you, young people, because you have defeated the Evil One. 
International Standard Version
I am writing to you, fathers, because you have known the one who has existed from the beginning. I am writing to you, young people, because you have overcome the evil one. 
King James Version
I write unto you, fathers, because ye have known him that is from the beginning. I write unto you, young men, because ye have overcome the wicked one. I write unto you, little children, because ye have known the Father.
New American Standard Bible
I am writing to you, fathers, because you know Him who has been from the beginning. I am writing to you, young men, because you have overcome the evil one. I have written to you, children, because you know the Father.
New International Version
I write to you, fathers, 
 because you have known him who is from the beginning. 
 I write to you, young men, 
 because you have overcome the evil one. 
 I write to you, dear children, 
 because you have known the Father. 
New King James Version
I write to you, fathers, Because you have known Him who is from the beginning. 
 I write to you, young men, Because you have overcome the wicked one. 
 I write to you, little children, Because you have known the Father. 
N.A.S.B. in E-Prime
I write to you, fathers, because you know Him who has existed from the beginning I write to you, young men, because you have overcome the evil one I have written to you, children, because you know the Father. 
Young's Literal Translation
I write to you, fathers, because ye have known him who `is' from the beginning; I write to you, young men, because ye have overcome the evil. I write to you, little youths, because ye have known the Father: