Let -- The word translated as "let" primarily means "to let go" or "to send away." This same word is usually translated as "leave," "forgive," "suffer," and "let" in the New Testament. See this article for more. It has the sense of leaving something alone and letting it drop.

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

alone: -- (CW) There is nothing that can be translated as "alone" in the Greek source. A better choice here would be "leave her be" or "let her be."

missing "in order that"  -- (OS) The untranslated word "in order that" is an adverb "in that place," "there," "where," "when," or as a conjunction that starts a subordinate clause  "that," "when," "in order that" or "because." It did not appear in the KJV Greek source.

against -- (CW) The word translated as "unto" means "into" a place, "towards" as a direction, "in regards to" a subject, and "up to" limits in time and measure. It also means "for" a purpose or "until" a time, either of which works here. It is not the word usually translated as "against.:

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. 

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

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.

my .-- "My" is the first-person possessive singular pronoun. This pronoun follows the noun so "of mine." 

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. 

burying - (WF) The word translated as "burying" only appears in the Gospels. It is constructed of two Greek words meaning "in tomb." The English word is "entombment." It is a noun, not a participle.

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

missing "should" or "might"-- (MW) A helping verb is necessary because the following verb is a verb of possibility, a subjunctive, something that "should" or "might" occur. The helping verb is not needed in a clause beginning with an "if" or a "when."

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

kept   - The word translated as "keep" means "to watch over," "to guard," "to take care of," "to give heed to," "to keep," "to test by observation or trial," and "to observe." Jesus uses this word seventeen times, almost always with the idea of "keeping" in one commandment or another. "Keep" works best because it combines the idea of "guarding" and "observing."

this. - (CW) The word translated as "this" is the Greek word commonly translated as third-person pronouns in English. It is a neuter word so "it." It is usually not translated as "this," which is commonly another word.