Saying,   -(OS)  The word translated as "Saying" appears in Matthew 20:12 in the current sources, but in the KJV it appears previous verse. It is the most common word that means "to say," and "to speak." This is in the present tense.

These -- "These" is translated from a Greek word that means "this," "that," "the nearer."

missing "the"  -- (MW) The untranslated word is the Greek definite article, 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. 

last  - "Last" is from an adjective that has many meanings, which are used in the wordplay in this verse. In space, this means "furthest." In degree, it means "uttermost" and "highest." In persons, it means "lowest" and "meanest." Of time, it means "last" and "ending." Here, is used as a noun.

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. This is the tense that means "at some point in time."

wrought  - (CW) The same word is used in this verse that is translated as "wrought" and "made." Both from verb which has two general meanings of "make," and "do" and this verse combines both meanings. No English word has quite the same two ideas. In the sense of "make" this word means "to produce," "to bring into existence," "to bring about," and "to cause." In the sense of "to do," it means "to act" and "to be effective." It is usually translated as "do" in the Gospels, but our word "perform" works better for the way Jesus uses it. In both examples here that is its primary meaning.

but -- (IW) There is nothing in the Greek that can be translated as "but" in the Greek source.

one -- The Greek word translated as "one " means "one" (as opposed to other numbers), "single," and "one and the same."

hour,  - - The word translated as "hour" means a period of time equal to the one-twelfth part of the daylight, like an "hour."

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

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

hast - (WT) This helping verb "hast" indicates that the verb is the tense indicating an action completed in the past. This is not the tense of the verb here. This is the tense that means "at some point in time."

made -- The Greek word translated as "to do" has the primary meaning of "making" or producing" something or "causing" or "performing" as service. It describes a productive action.  It is not as broad a word as the English "do," which covers all actions, productive or not. 

them - The word translated as "them" is the Greek word commonly translated as third-person pronouns in English.

equal  -- Equal" is  means "equal" in size, strength, number, or rights; of persons, "fair," "impartial"; of ground, "even," "flat"; generally, "just," "fair." It is also used to mean an "equal share" or "equally distributed." Jesus only uses this word four times.

unto -- This word "unto" 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.

us, - -  "Us" is the 1st person, plural, accusative pronoun. Jesus only uses this pronoun in seven verses this pronoun seven times, most often in the Lord's Prayer.

which -- The word translated as "which" is the Greek definite article, which when not preceding a noun, takes the meaning of "the one" or, in the plural, "the ones." The Greek article is much closer to our demonstrative pronouns ("this," "that," "these," "those"). See this article for more. 

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. This is the tense that means "at some point in time."

borne  - "Borne" is from a verb that means to "lift up" "raise," "endure," and "bear." Jesus only uses it six times, always in the sense of taking up a heavy responsibility. It is in the form of an adjective ("enduring") used as a noun ("the ones enduring."

the -- The word translated as "the" is the Greek definite article. The Greek article is much closer to our demonstrative pronouns ("this," "that," "these," "those") than the English "the." See this article for more. 

burden  - "Burden" is from an adjective that means "weight," "heaviness," "burden," and, in a positive sense, "abundance." Here, it has the sense of the greater part, what the Greeks would call "the weight" of something.

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

missing "the"  -- (MW) The untranslated word is the Greek definite article, 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. 

heat -  "Heat" is from a noun that means "burning heat" and "summer heat." Jesus only uses this word two times, both related to hot weather.

of -- This word "of"  comes from the genitive case of the following word that requires the addition of a preposition in English.  The most common is the "of" of possession. In references to time, it could instead be translated ‘during’, ‘at’, or ‘within’.

the -- The word translated as "the" is the Greek definite article. The Greek article is much closer to our demonstrative pronouns ("this," "that," "these," "those") than the English "the." See this article for more. 

day. -- The Greek word translated as "day" also means "time," in general, and refers specifically to the "daytime."