These -- "These" is translated from a Greek word that means "this," "that," "the nearer." -- The word translated in KJV as "thus" is in its adverbial form, so it means "in this manner" or "in this way."

are -- There is no verb "to be" here in the Greek. However, when nouns, pronouns or adjectives appear in the form of a subject without a verb, the verb "to be" can be assumed.

the  -- The word translated as "the" 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. 

words -- (CW) "Words" is translated from a Greek word that means "calculation," or "reasoning," but it has many, many specific meanings from "deliberation," "question," "subject matter," "narrative," and so on.  It is the source of our word "logic" and is the root word for all the English words that end in "-ology." Most biblical translations translated it as "word" for somewhat poetic reasons. However, when applied to people, it means "repute" or "reputation." More about this word in this article. In English, we would say "logic," "concept, or "reasoning" to describe it but it also means the communication of various types, so "message" often works. "Teaching" might work but it is unrelated to the common words for "to teach," "teacher," and "student" that all have the same root.  

missing "of mine"  -- (MW) The untranslated word is the first-person possessive singular pronoun, "my," "me," and "mine." Usually follows the noun so, "of mine."

which -- The word translated as "which" is a demonstrative pronoun ("this" "that"), but it often acts as a pronoun ("the one that), especially a connective pronoun ("the one that") introducing a dependent clause.

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

spake --   -- (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," "communicating," "relaying," or "passing on" information.  When there isn't an object, and one cannot suggest itself from the previous context, "transmit" captures the idea of being a conduit rather than a source of information. 

unto  -- The word translated as "unto" means "towards,"  "before," "by reason of (for)," and "against." Usually, the phrase "unto you" is just the indirect object form of "you" since the preposition is not needed.

you -- The "you" here is the second-person, plural pronoun in the form of an object.  

while ---- (IW) This word is not in the Greek source.

I -- (IW) The next word is not a first-person verb so an "I" is not warranted. 

was -- (WF) The verb "was" here is the common form of "to be" in Greek. It means to have a certain characteristic or remain in a certain condition. It also equates terms or assigns characteristics.  It is in the form of an adjective, "being."  

yet  -- Yet" is an adverb that means "yet" and "still," "already,"  "longer," "no longer" (with a negative), "still" and "besides." 

with -- (CW) The word translated as "with" is is from a preposition that Christ rarely uses that means "together with" and, when referring to things "attached to" and "by means of." He uses this word because he is "with" them now in one sense, but not longer part of their company. This is not the word usually translated as "with." 

you --  The Greek pronoun "you" here is plural and in the form of an indirect object, "to you," "for you," etc. 

that -- The word translated as "that" introduces a statement of fact or cause. Jesus seems to use it like our word "because" to begin the answer of a question.

all -- The word translated as "all things" is the Greek adjective meaning "all," "the whole," "every," and similar ideas. When it is used as a noun, we would say "everything." The "things" comes from its plural, neuter form. This is not the subject of the verb, but its object.

things -- Though the subject is plural, the verb is singular because neuter plural verbs are treated as a collective.

must -- (CW)  The Greek verb translated as "must" is a special verb that means "it/he/she needed," and "there was a need." It is not a helping verb like we have in English but an active verb. It is always singular, 3rd person, past tense. Its form is fixed and, when it refers to a verb, that verb's form is an infinitive like we say "he needed to go," but the subject is not separate from the verb. 

be -- This helping verb "be" indicates that the verb is passive. Helping or auxiliary verbs are needed to translate the Greek verb forms into English.

fulfilled-- (WF) "Fulfilled" is a verb that means "to fill," "to fulfill," and "to fill full." This word is an infinitive required by the "needs" above, not an active verb. 

which -- (WW) The word translated as "which" 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. Here, it preceded an adjective, making it work like a noun. This word doesn't mean "which."  

were -- (WT) This helping verb indicates the passive, past tense of the verb. This verb is in the passive, past, perfect tense so "has been" is correct.  

written -- "Written" is the Greek verb that  means "to mark," "to express by written characters," "to write a letter," "to write down [a law]," and so on. The form is an adjective describing something completed in the past, "having been written." Introduced by an article, it acts like a noun, "these having been written."

in -- The word translated as "in" also means "within," "with," or "among."

the -- The word translated as "the" 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. 

law  --- The Greek word translated as "the law" describes the social norms, which can be from "tradition," "common practice," or the "laws." Christ also uses it to refer to the first five books of the OT written by Moses.

of -- This word "of"  comes from the possessive form (genitive case) of the following word that requires the addition of a preposition in English.  The most common is the "of" of possession.

Moses -- "Moses" iis the Greek spelling of the word we translated as "Moses."

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

in -- (IW) This word is not in the Greek source. 

the -- The word translated as "the" 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. 

prophets -- The Greek word translated as "the prophets" means "one who speaks for God," "interpreter" and was the highest level of priesthood in Egypt. Christ uses it to refer not only to divine spokespeople, but their books in the OT. It is the verb that means "to shine before." Our word "luminaries" captures the idea very well. 

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

in -- (IW) This word is not in the Greek source. 

the -- (IW) This word is not in the Greek source. 

psalms -- "Psalms" is a Greek word that means "twitching" of finger on musical instrument, and "the sound of the cithara or harp." We would say "pluckings." We use the Greek word, psalmos, instead of translating it.

concerning -- The Greek word translated as "concerning" means It means "around" when referring to a place, but, in this context, it means "about," "concerning," "on account of," and "in regard to." This is the way Christ usually uses it.

me -- "Me" is the regular first-person pronoun in Greek in the possessive form, so "my" or "of me."