Teaching  - The Greek word translated as "teaching" means "to teach," "to instruct," "to indicate," "to explain," and "to give sign of." Christ uses this word and its noun form, "teacher," frequently. This is a different word that the word translated into "teach" in the KJV of the previous verse.

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

to -- This "to" is added because the infinitive form of the verb requires a "to" in English.

observe  - The term "observe" means "to watch over," "to guard," "to take care of," "to give heed to," "to keep," and "to observe." Christ usually uses it to describe what people should do with teaching or laws.

all  - - The word translated as "all" is from the Greek adjective meaning "all," "the whole," "every," and similar ideas. When it is used as a noun, we would say "everything."

things  - There is no word, "things," in the Greek source, but this word comes from the neuter, plural form of the previous "all."

whatsoever  - -  (WW) "Whatsoever" is from a Greek adjective that is used as a comparison "as many as," "as much as," "as great as," "as far as," and "only so far as."

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

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

commanded  - "Commanded" is from a Greek verb that primarily means to give verbal commands or orders. Jesus only uses this word six times.

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

missing "myself"-- (WV) A phrase is necessary because the form of the previous verb is a middle voice, which means that the subject is to  act on "myself," "for myself" or "by myself."

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

lo,  - (CW) "Lo"  is a verbal command meaning "See!" and "Look!" It is from the most common word meaning "to see" in Greek. In a humorous vein, it is also an adverbial exclamation like we use the phrase "ta-da" in a magic show, or "voila" in French which means "see there". "Look here!" or "See there!" comes closest in English. Jesus uses it both ways.

I  - The pronoun "I" is used here. Since, as the subject of the sentence, it is part of the verb, its explicit use accentuates who is speaking "I." Saying "I myself" captures this feeling in English.

missing "myself" -- (MW)  The subjective pronoun repeats the information in the verb so it should be repeated in English like "I myself."

am  - The verb here is the common form of "am" in Greek. It means to have a certain characteristic or remain in a certain condition.

with  -  - "With" is from the Greek word that is almost always translated as "with" or a related concept such as "among" or "by the means of."

you -- The word translated as "your" is a plural, second-person pronoun in the genitive case. This pronoun follows the noun so "of yours."

al - -- The word translated as "all" is the Greek adjective meaning "all," "the whole," "every," and similar ideas.

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

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

unto  - The word translated as "unto" means "until" but it also means "in order that."

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. 

end -- (CW) The word translated as "end" means literally "to bring together for a goal." It means the accomplishment of a shared purpose, so "culmination." It does not mean "end" in the sense of "destruction" of anything since it has the opposite sense of "accomplishment." It is also not the common word usually translated as "end."

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.

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. 

world.  - - (WW) "World" is from a word that means "life," "lifetime," "age," or "generation." It is the source of our word "aeon." Christ seems to use it in a way to means either a lifetime or an age.

Amen. -- (OS) There is nothing in the Greek that can be translated as "also" in the source we use today but it does exist in the source that the KJV translators used. In the KJV, this word is usually translated as "verily," but not here.