Why - The Greek word translated as "any" in the singular means "anyone," "someone,"  "something," and "anything." The same forms are used both for the masculine or feminine so "anyone" works best for a person. In the plural, it means "everyone," "some," "they," and "those." Jesus often uses it to start a question so it means "who," "what," or even "why."

askest   -- (CW) The word translated as "ask" means "consult," inquire of," and "ask." It is used extremely commonly in the narrative parts of the NT, but Jesus the word rarely. Jesus usually uses another Greek word for this common idea.  Here, this word is used twice with Caiaphas and Pilot, when he is being "interrogated.," which is the best translation for how Jesus uses it. This is not the word usually translated as "ask."

thou -- This is from the second-person, singular form of the verb.

me? "-- "Me" is the regular first-person pronoun in Greek as the object of the verb or preposition.

ask --  (CW) The word translated as "ask" means "consult," inquire of," and "ask." It is used extremely commonly in the narrative parts of the NT, but Jesus the word rarely. Jesus usually uses another Greek word for this common idea.  Here, this word is used twice. With Caiaphas and Pilot. This is not the word usually translated as "ask."

them -- (CW) The word translated as "them" is the Greek definite article; without a noun, it has the sense of "the one." The Greek article is much closer to our demonstrative pronouns ("this," "that," "these," "those") than the English "the." See this article for more.  This is not the word usually translated as "them."

which -- (IW) There is nothing that can be translated as "which" in the Greek source. It was added because the next verb was translated as active rather than as a participle.

heard -- (WF)  "Heard" is from a Greek verb that means "to hear" and "to listen." It has the same sense as the English not only of listening but of understanding.   It also means "to listen" and "to understand," but amusingly, it also means "to be silent." The accusative object is the person/thing heard about, while the genitive is the person/thing heard from. The form of the word is not an active verb but a participle, a verb in the form of an adjective, "hearing."

me, -- -- (IW) There is nothing that can be translated as "me" in the Greek source.  .  In Greek, pronoun objects are not repeated after each verb because they are implied by their first occurrence, but the object here is the following "what."

what - The Greek word translated as "any" in the singular means "anyone," "someone,"  "something," and "anything." The same forms are used both for the masculine or feminine so "anyone" works best for a person. In the plural, it means "everyone," "some," "they," and "those." Jesus often uses it to start a question so it means "who," "what," or even "why."

I -- This is from the first-person, singular form of the verb.

have -- (WT) This helping verb "have" indicates that the verb is the tense indicating an action completed in the past. This is not the tense of the verb here.

said -- (CW) The Greek word translated as "speak" is not the ordinary "to say," "to talk," "to tell," or "to speak" in Greek. This word means "idle chatter," "gossip," and "the proclamations of an oracle." Jesus uses it to capture the idea of "passing on." "conveying,"  or "relaying" information.  When there isn't an object, "transmit" captures the idea of being a conduit rather than a source of information.

unto  -- This word "to" comes from the dative case of the following word that requires the addition of a preposition in English. The most common is a "to" for the English indirect object.

them: -- The word translated as "them" or "to them" is the Greek adjective that acts like our third-person pronoun. The form is the third person, plural as an indirect object of the verb or the object of a preposition.

behold,  -- The verb translated as "behold" means "to see" but it is used like we use the word "see" to mean "to know" or "to perceive." In th KJV, it is almost translated as many times as "know" as it is "see." Here, however, it is a command like we say "SEE/" when explaining something to someone. This is a play on the word translateed as "know" below, which means "have seen."

they -- (CW)  "These" is translated from a Greek adjective that means "this," "that," "the nearer." Without a noun, it has the sense of "this one here" or "these here." It is in the form of a subject.

know -- The word translated as "know" means primarily "to see" and is used to mean "know' as we use the word "see" to mean "know" in English. It is the past perfect tense so "have seen" but it is translated as the present tense of "know."  What someone "has seen" is what they "know" in the present. Since the past perfect of "see" forms the present tense of "know" the pluperfect tense used here, which indicates an action completed before some other action in the past, is used as the simple past tense, "knew." 

what -- The word translated as "what" is a demonstrative pronoun ("this" "that"), but it often acts as a pronoun "which," "what," "who," "whosoever," "where," "for which reason," and many similar meanings.

I -- The pronoun "I" is used here.  When it has no verb, the verb "is" or the previous verb is assumed. When the subject of the sentence is part of the verb, this pronoun accentuates who is speaking "I." Saying "I myself" captures this feeling in English.

missing "myself" -- (MW)  The subject pronoun repeats the information in the verb so it should be repeated in English like "I myself."

said. - The word translated as "speak" means "to say" and "to speak." It is one of the two most common words translated "speak," "say" and "tell," but it has more a sense of addressing and proclaiming.