Do -- This helping verb is used to create questions, commands, negative statements, and smooth word flow in English, but the Greek could be either a question or a statement.

not  - - The negative used here is the Greek negative of a subjective opinion, commands, and requests. The sense is that "you don't want" to do something, not that it isn't done or don't think something that might be true. If it wasn't done or wasn't true, the objective negative of fact would be used.

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.

afraid:  - - "Afraid" is translated from a Greek word that means "to terrify" and "to put to flight," but in the passive, it means to be put to flight and be frightened. When applied to people, it means to "be in awe of" or "dread." It is a command in the voice that could be passive or in the middle voice, which would mean "make yourself fearful."

Go - - "Go" is from a Greek verbal command that means literally "go under" or "bring under," but Christ usually uses it to mean "go away" and "depart."

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

tell  - (CW) "Tell" is from a word Christ uses rarely that means "bring tidings," and "report." It is not one of the common words translated as "tell" or "say." This is an uncommon word that Jesus only uses three times.

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, 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. 

brothers - The word translated as "brothers " means a biological brother, any kinsmen, and more broadly and friend or associate.

missing "that"  -- (MW) The untranslated word "that" is an adverb or conjunction that starts a subordinate clause "there", "where," and "in order that."

to -- (WF) This "to" is added because the infinitive forgom of the verb requires a "to" in English. The verb is not an infinitive.

missing "should"  -- (MW) The untranslated word "should" indicates that the verb describes a possibility, the subjunctive voice. A "might" or "should" in English is more appropriate, but is assumed in an "if/when/whoever/except" clause. Helping verbs are not needed in Greek since the main verb carries this information in its form.

go  - (CW)  The Greek verb translated as "they go" means "to go away," and "to depart from." This is not the same "go" as is used above.

to - -  The word translated as "to" means "into" a place, "towards" as a direction, and "up to" limits in time and measure.

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. 

Galilee, -- "Galilee" is from the Greek spelling of the Judean place name.

missing "and"  -- (MW) The untranslated word "and" is a part of the following contraction.

there -- "And there" is translated from a Greek contraction meaning "and there" and "and then,"  but in logic means "and in the intelligible world."

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

they -- This is from the third-person, plural form of the verb.

see  - (CW) The Greek verb translated as "they shall see" means "to see", "to look" and "to look out for." It is in the future tense. It is not the most common words translated as "see" but one meaning seeing with their eyes.

missing "for themselves" -- (MW)  The middle voice of the verb indicates that the subject does something to, for, or by themselves.

me.-- "Me" is the regular first-person pronoun in Greek as the object of the verb or preposition.