And -- The Greek word translated as "and" is used as the conjunction "and," but it also is used to add emphasis.
 

when he -- (IP) There is nothing that can be translated as this phrase in the Greek source.

cometh -- (WF) The word translated as "come" primarily means "to start out" but Jesus usually uses it to mean "come" but not always. It indicates movement, especially its beginning, without indicating a direction toward or away from anything, so it works either as "start," "come," or "go," but it is more like our phrase "being underway." Technically, it is in the middle voice meaning the subject acts on himself. In English, this is assumed in our words "come" and "go." Our English word "show up" captures both the "start" and "come" ideas. See this article for more This is not an active verb but a participle, a verbal adjective, "coming."

missing "into that"  -- -- The word translated as "into" means "into" a place, "towards" as a direction, "in" (a position),  "as much as (of measure or limit)," "in regards to" a subject, "up to" limits in measures, "until" in reference to time, "within" a time limit, and "for" a purpose or object. Used with the Greek "from" it means "from...to.".The untranslated "that" is the Greek definite article," the," which usually precedes a noun or changes the word it precedes (adjective, infinitive, participle, etc.) to act like a noun. The Greek article  "that" is much closer to our demonstrative pronouns ("this," "that," "these," and "those"). See this article for more.

home, -- The Greek word translated as "home," is any dwelling place but not exclusively a separate house. It means the household or clan that lives in the building as well. The English word "house" captures the idea of a "ruling family" so that works well for this word. The female form of the word has more the feel of "home."

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

calleth together -- The verb translated as "calleth together" is used for the first time here, but it is the word usually translated as "call", which also means "invite" with the prefix meaning "together". which means to "call to council", "convoke", "convene", and specifically "invite with others" to a feast.

his - -- (WW) The word translated as "his" is the Greek definite article, "the," which usually precedes a noun or changes the word it precedes (adjective, infinitive, participle, etc.) to act like a noun. The Greek article is much closer to our demonstrative pronouns ("this," "that," "these," "those") than the English "the." See this article for more.    This word doesn't mean "his." 

friends -- "Friends" is an adjective means "loved," "beloved," "dear," "kith and kin," "nearest and dearest," "friends," and (of things) "welcome" and "pleasant." It is an adjective used as a noun. In English, we would say "loved one."

and-- The Greek word translated as "and" is used as the conjunction "and," but it also is used to add emphasis.

missing "these/those/the"-- (MW) The untranslated word is the Greek definite article," the," which usually precedes a noun or changes the word it precedes (adjective, infinitive, participle, etc.) to act like a noun. The Greek article is much closer to our demonstrative pronouns ("this," "that," "these," and "those"). See this article for more

neighbours, -- The noun translated as "neighbor" means "neighbor" or "one of like kind". This is not the common word translated as "neighbor" in verses such as "love they neighbor".

saying -- The word translated as "saying" is the most common word that means "to say," "to tell," and "to speak,"  but when used with an objective noun or pronoun, the sense is "say of" or "speak of."    It also has many ancillary meanings such as "to count" ("to number" or like we might say, "to recount" a story) or "to choose for yourself."

unto -- This word "to" comes from the indirect object form 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.

Rejoice -- "Rejoice" is another Greek verb used for the first time here. It consists of the more common word for "rejoice" with the prefix meaning "together". It means  "rejoice with", "wish one joy", and "congratulate." The form is not an active command as translated. It is most likely the future tense statement,  "together you will celebrate ". If it was a command, it would have to be passive which would be "Be celebrating together" 

with -- This word "to" comes from the indirect object form of the following word that requires the addition of a preposition in English. The most common is a "to" for the English indirect object. However, the translator can choose other prepositions: "with,"  "in,"   "of,"  "as," "by," "for," "at," or "on" depending on the context.

me; -- The "me" is in the indirect object form of the first-person pronoun, so usually "to me,""for me," and "by me."

for -- The word translated as "that" introduces a statement of fact or cause, "for what," "because," "since," "seeing that," "that," and "wherefore." Jesus usually uses this word to mean "because" in statements that seem like an answer to a question because of the change of context. It means "because" when answering a "why" question and "that" when explaining a "what" question. Another common word is used for "for."

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.

found -- The term used for "find" is the source of our word, "heuristic," meaning enabling a person to find out something for themselves. It means "find out" and "discover."

my -- "My" is the first-person possessive singular pronoun, "my," "me," and "mine." Usually follows the noun so, "of mine."

missing "the/this"  -- (MW) The untranslated word is the Greek definite article," the," which usually precedes a noun or changes the word it precedes (adjective, infinitive, participle, etc.) to act like a noun. The Greek article is much closer to our demonstrative pronouns ("this," "that," "these," and "those"). 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.

which -- (CW) The word translated as "which" is the Greek definite article, "the," which usually precedes a noun or changes the word it precedes (adjective, infinitive, participle, etc.) to act like a noun. 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 "which."

was -(WT) This is not the past tense but the past perfect tense, "has been."

lost. -- (WF)The word translated as "lost" means to "destroy" or "demolish" and means "perish" in the passive. However, it can also mean to "lose" things. Its literal meaning from its root is "destroy from" or "ruin from." It is often used in the middle voice to describe people losing or destroying themselves.This is not an active verb but a participle, a verbal adjective, "having been lost." WF -- Wrong Form -  This is not an active verb but a participle, a verbal adjective, "having been lost."