And -- (OS) There is nothing in the Greek that can be translated as "and" in the source we use today but it does exist in the source that the KJV translators used.

when -- The Greek word translated as "when" introduces a phrase that explains a certain condition so "whenever" or "since."

he -- This is from the third-person, singular form of the verb.

putteth-- (CW) "Putteth" is a verb that means "throw out." Depending on the context, it can mean "toss out," "turn out," or "take out." It is usually translated as "cast out" in the NT.

forth -- This is from the prefix of the verb meaning "out of."

missing "the"  -- (MW) The untranslated word is the Greek definite article,"the," which usually precedes a noun and, without a noun, takes the meaning of "the one." The Greek article is much closer to our demonstrative pronouns ("this," "that," "these," "those"). See this article for more. 

his own -- The word translated as "his own" is a very unusual word. It is not the very common pronoun usually translated as "his," but a specific word that means "one's own," "pertaining to oneself," and "private."

sheep, -- -- (OS) There is nothing in the Greek that can be translated as "sheep" in the source we use today but it does exist in the source that the KJV translators used. In current sources this "all," the Greek adjective meaning "all," "the whole," "every," and similar ideas. When it is used as a noun, we would say "everything." As an adverb, it means "in every way," "on every side," and "altogether."

he -- This is from the third-person, singular form of the verb.

goeth -- The Greek verb translated as "go" is the most common verb translated as "go" in the NT. This word means "to lead over," "depart," and "to carry over." This word, however, uniquely means both "to pursue a course" and "to depart from life." In the active voice, it means "made to go" or "carried over" but in the passive or middle,its normal form, the subject is either being taken or taking himself and means "going," "crossing over," or "departing" more directly.

before -- The Greek word translated as "before" means "in front of" referring to place and when used to apply to time means "beforehand."

them, -- The word translated as "them" is the Greek word commonly translated as third-person pronouns in English.  The word means "the same" when used as an adjective. In the adverbial form, it  means "just here" or "exactly there." This pronoun follows the noun so "of his."

and -- The Greek word translated as "and" is used as the conjunction "and," but it also is used to add emphasis ("also"). In a series, it is can be translated as "not only...but also." After words implying sameness "as."

the -- The word translated as "the" 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. 

sheep -- "Sheep" is Christ's symbol for his followers. The Greek word refers to any domesticated animal and works better if translated simply as "flock" or "herd." The flock follows the shepherd, which is above them. It is also together, a united group.

missing "of his"  -- (MW) The untranslated word "his" is the Greek word commonly translated as third-person pronouns in English.  This pronoun follows the noun so "of his."

follow -- The term "follow" means "to follow," or "go with," in a physical sense, but it is also a metaphor meaning "to be guided by" or "to follow the meaning of."

him -- The word translated as "him" is the Greek word commonly translated as third-person pronouns in English.  The word means "the same" when used as an adjective. In the adverbial form, it  means "just here" or "exactly there." This pronoun follows the noun so "of his."

: for -- The word translated as "for" introduces a statement of fact or cause, "for what," "because," "since," and "wherefore."

they -- This is from the third-person, plural form of the verb.

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. There is another word Jesus could have used here to mean know, but using the word "have seen" is funnier. This verb is technical the past perfect tense, but the past perfect of "to see" is used to mean "know."

his -- The word translated as "his" is the Greek word commonly translated as third-person pronouns in English.   This pronoun follows the noun so "of his."

missing "the"  -- (MW) The untranslated word is the Greek definite article,"the," which usually precedes a noun and, without a noun, takes the meaning of "the one." The Greek article is much closer to our demonstrative pronouns ("this," "that," "these," "those"). See this article for more. 

voice: -- The noun translated as "voice"  means "sound", "speech", "voice",  "cry" [of animals], "sounds" [of inanimate objects], and "report."