“Watch out  -- The verb translated as "take heed" means "to see", "to look to", "to look like", "to beware" and "to look for". It is the more tangible sense of seeing, such as seeing what is right in front of you rather than understanding "look" in English or in a warning like this, "watch out".

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

you -- This is from the second-person, plural form of the verb.

missing "should" or "might"-- (WF) A helping verb is necessary because the following verb is a verb of possibility, a subjunctive, something that "should" or "might" occur. 

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

not  -- The negative used, "not", 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. To capture the sense of this negative in English, we have to insert a verbal phrase that changes the form of the English verb from the Greek.

deceived -- "Deceived" is from a verb that means "to cause to wander", "to lead astray", "to mislead", "to wander", "to stray" and "to be misled". The form indicates something that "might" or "possibly happens and it is passive, "might be led astray".

For --The word translated as "for" introduces a reason or explanation so "because" and, in questions, "why". "For" is better because another common word is also used for "because".

many -- The word translated as "many" means many in number, great in power or worth, and large in size.

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

come -- The word translated as "come" primarily means "to start out". It indicates movement, especially its beginning, without indicating a direction toward or away from anything, so it works either as "start", "come" or "go". but it is more like our phrase "being underway". Christ, however, uses it most often, but not always, in the sense of "come". It is in the future tense.

in -- (CW) The word translated as "in" means "against", "before", "by" or "on". It is NOT the word Christ usually uses with the Greek phrase usually translated "in" someone's name, for example, Matthew 23:39. for "in the name of the Lord". That Greek word has the sense of "in the power of". This word does not have the same sense, nor is it the other Greek word commonly translated as "in" that means "within". "Against" seems to be the only meaning here that makes sense. This is not one of the common words usually translated as "in". 

my --- "My" is the first-person possessive singular pronoun, "my", "me" and "mine". Usually follows the noun so, "of mine".

missing "the/this"  -- (MW) The untranslated word 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", and "those"). See this article for more. 

name -- The Greek word translated as "name" is much more complicated than it might at first appear. It can simply mean a "name" as in English, this can be many things. It doesn't mean the thing itself, but what people call it. For example, it can mean a "false name" or "a pretense" as we say "this is a marriage in name only". It can also mean representing another person's authority, as we say, "he is acting in the name of the boss" or, in this case, "against the name".

claiming --- (CW) The word translated as "claiming" is the most common word that means "to say" and "to speak". but it also means "to teach", which seems to be the way Christ uses it more frequently. However. it also means "to proclaim", which is how it usually works best when Christ puts it in the mouth of his opponent. This is word not usually translated as "claiming".  

I -- The pronoun "I" is added to add emphasis that he is referring to his own words. It is unnecessary because the first person is part of the verb ending. Christ sometimes uses it humorously to refer to himself. However, when you put the accent on "I" when you speak this phrase, it makes the statement sound like a claim his opponents are saying about themselves, not about Christ.

missing "myself" -- (MW)  The pronoun "I" is used here. When the subject of the sentence is part of the verb, this pronoun accentuates who is speaking "I". Saying "I myself" captures this feeling in English. The subject pronoun repeats the information in the verb so it should be repeated in English like "I myself". 

am -- The verb "am" 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.  The word also means "to exist" and where it doesn't connect to characteristics or conditions.

he-- -- There is no Greek pronoun here, but Greek does not need pronouns when the object can be assumed from the context. In English, they are added for the subject-verb-object form of our sentences.

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

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. 

time -- "Time" is a noun that means "due measure", "season", "opportunity", "time" and "profit".

is near --  (WT) The verb translated as "is near" The verb translated as "is" means "to bring near", "to approach", "to bring up to" and "to be imminent". In English, we would say "nears" or, in the form here, "has neared", doesn't quite work so perhaps "has gotten close" or, in the case of time, "is nearly here". It is the verb form of an adverb "near" in space, time, and relationships.This is the same verb that is translated as "is at hand" in the phrase, "The kingdom of heaven is at hand". It is not seen in written Greek before Jesus and used by him only seventeen times. This is not the present but the past perfect tense, "has neared". 

Do -- This helping verb is used to create questions, commands, negative statements, and smooth word flow in English.

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.

follow -- (CW) Two Greek words are translated as "follow" that mean "go behind". The verb translated as "follow" is the most common verb translated as "go" in the NT.  This word means "to lead over", "depart" and "to carry over". This word, however, uniquely means both "to pursue a course" and "to depart from life".  The term translated as "behind" means "back", "after" and "behind" in space, but "forward" in time. The logic regarding time is that, since the future is unseen, it should be regarded as behind us, whereas the past is known and therefore before our eyes. This seems quite strange to English speakers, but the use of this word in Greek is well-established to mean "future". Our English view coincides with the ancient Greek when discussing books. The "back" of the book in English means the "end" of the book, which is the future for the reader. This use of "back" is identical to the Greek.  This is not the word usually translated as "follow".

them. -- The word translated as "them" is the Greek word commonly translated as third-person pronouns in English.  The word means "the same" when used as an adjective. In the adverbial form, it  means "just here" or "exactly there".