missing "and"  -- (MW) The untranslated word"and" is used as the conjunction "and," but it also is used to add emphasis ("also") and, In a series, it is can be translated as "not only...but also." When used in writing, it creates complex sentences, but when spoken, it makes a good pausing point so that an important or humorous word can follow.

“If - The "if" here expresses a condition but it means nothing regarding whether that condition is met or not. It also means "if ever" and "whenever."

those  - The word translated as "those" is an adjective that highlights its noun as being in a specific place or time from a word that means "there." This word appears after "days."

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. 

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

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

not -- (CW) The negative used here is the Greek negative of a subjective opinion, commands, and requests. The sense is that "you don't want" or "think" something, not that it isn't done or thought.   With the verb "to be," the sense is "doesn't seem." When a negative precedes the verb, it affects the whole clause.

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

cut short,  --  "Cut short" is from a word that means "to curtail" from a base meaning "to prune" tree or "to clip" a bird's wings. The tense of the verb indicates a point in time that could be past, present, or future and, because of the context, we might interpret it as the future. 

missing "probably"  -- (MW) The untranslated word a particle used with verbs to indicate that the action is limited by circumstances or defined by conditions. There is no exact equivalent in English, but it is translated as "possibly," "would have," "might," "should," and "could."

no -- (WP) The Greek word translated as "no" is the Greek negative used to deny objective facts, not opinions. It makes a negative statement of fact. This negative appears before the previous word, "possibly" negating it, not "flesh."

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

would -- (WW) "Would" is from a word that limits the verb by circumstances. It works similarly to the "might" or "should" of a subjunctive verb, but we don't want to confuse it with the subjunctive so using "possibly" provides a consistent translation. The same Greek letters can always be the more common conjunction meaning "when," so this meaning comes from context.

missing "all"  -- (MW) The untranslated word "all" is the Greek adjective meaning "all," "the whole," "every," and similar ideas. The form matches the following word "flesh."

missing "flesh"  -- (MW) The untranslated word "flesh" means "flesh," "meat," and "the physical order of things" as opposed to the spiritual. It is often contrasted it with the Greek word translated as "spirit," so he usually uses it in the later sense.

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

survive, -- (CW, WV) "Survive" is from the Greek word that means "to keep alive" when applied to people or "to keep safe" when applied to things. Jesus s it to mean "rescue" in most cases. The voice is passive, not active.

but  - The Greek word translated as "but" joins phrases in an adversarial way. Since it always falls in the second position, translating it as "however" often captures its feeling better.

for -- (CW) The word translated as "for" means "through," in the midst of," or "by (a cause)." The sense here is "by."  This is not the particle usually translated as "for."

sake of -- (IW) There are no Greek words that can be translated as "sake of " in the source we use today nor was there one in the source that the KJV translators used. There is a word that Jesus commonly uses the means "sake."

the -- The word translated as "the" 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. 

elect --- - (UW) "Elect" is from an adjective that means "picked out," "select," "choice," and "pure." It is used as a noun there, "the ones selected." Our English word is adapted from Biblical Greek through Latin. Greek has a specific word that is used to say "sake" in this sense, but it is not used here.

those  - The word translated as "those" is an adjective that highlights its noun as being in a specific place or time from a word that means "there." This word appears after "days."

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. 

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

will -- -- This helping verb "will " indicates that the following verb is the future tense. Helping or auxiliary verbs are needed to translate the Greek verb forms into English. This is the same verb form that is translated as "should" above.

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

shortened, "Shortened" is from a word that means "to curtail" from a base meaning "to prune" tree or "to clip" a bird's wings.