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

were --  This helping verb indicates the past tense of the verb. 

eating, -- (WF) The word translated as "eat" means "eat" but it also means "fret," as we say "something is eating me up." This is not a participle forming a progressive or continuous tense,  but an active verb, "ate."

drinking,  --  (WF) The word "drink" is the Greek for meaning to "drink." It also has a double meaning. "To drink" also means "to celebrate." This is not a participle forming a progressive or continuous tense,  but an active verb, "drank."

marrying -- (WF) The word translated as "married" means, for a man, "to take a wife" and for a woman, to "give yourself in marriage."  This is not a participle forming a progressive or continuous tense,  but an active verb, "married."

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

being  -- (WF) This helping verb "being" indicates that the verb is passive. Helping or auxiliary verbs are needed to translate the Greek verb forms into English. This is not a participle forming a progressive or continuous tense,  but an active verb, "were."  

given in marriage, - The verb translated as "given in marriage" is used nowhere else in Greek besides the NT. It is from the same root as the above "marry," the Greek noun that means "wedding." 

up to -- "Up to" is from another uncommon word that means "until," but unlike the more common word for "until," it also has the sense of "continually until." 

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. 

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

Noah - "Noah" is the Greek spelling of the Hebrew name. 

entered -- "Enter" is a word that means "enter," "go or come into" of an accuse "come into court," and has the double meaning of "coming into one's mind."--

missing "into  "  -- (MW) The untranslated word   "into" means "into" a place, "towards" as a direction, "in" (a position),  "as much as (of measure or limit)," "in regards to" a subject, "up to" limits in measures, "until" in reference to time, "within" a time limit, and "for" a purpose or object. Used with the Greek "from" it means "from...to."

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. 

ark, -- "The ark" is translated from a Greek word that means a "box", "chest," and "coffer." The Hebrew word translated as "ark" both for the boat Noah built and the papyrus boat of the baby Moses also means "box" or "coffin".

Then -- (WW) The Greek word translated as "then" is used as the conjunction "and," but it also is used to add emphasis, "even," "also," and "just." This word doesn't mean "then."  

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. 

 flood - The word translated as "flood" also means "deluge."

came, -- The word translated as "come" primarily means "to start out" but Jesus usually uses it to mean "come" but not always. 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." Technically, it is in the middle voice meaning the subject acts on himself. In English, this is assumed in our words "come" and "go." Our English word "show up" captures both the "start" and "come" ideas. See this article for more.

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

destroyed -- The word translated as "destroyed " means to "destroy" or "demolish" and means "perish" in the passive. However, it can also mean to "lose" things. Its literal meaning from its root is "destroy from" or "ruin from." It is often used in the middle voice to describe people losing or destroying themselves.

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

all. -- The word translated as "all" is the Greek adjective meaning "all," "the whole," "every," and similar ideas. When it is used as a noun, we would say "everything." As an adverb, it means "in every way," "on every side," and "altogether."