For --The word translated as "for" introduces a reason or explanation so "because" and, in questions, "why." However, since this word always appears in the second position, it is more like an aside remark like, "consequently" or "as a cause". 

when  -- (CW) The Greek word translated as "when" introduces a phrase that explains a certain condition so "whenever" or "since." This is not the more common word for "when." Here, the condition is less certain to happen.

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

shall -- (CW) This helping verb "shall" does not indicate the future tense, but 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.

rise -- "Rise " is a Greek verb that means "to make to stand up", "to raise from the dead", "to rouse to action," and "to make people rise up." This is not the word Jesus uses to instruct his apostles to "raise the dead" in Matthew 10:8, which is also the word Jesus uses to describe his own resurrection.

from -- The Greek preposition translated as "of" means "out of" or "from." In Greek, they use the genitive case instead of a preposition for the types of phrases with usually use with "of."

the -- There is no Greek word "the" here but the following word is plural and this word makes it appear that way.  

dead, -- The word translated as "the dead" means "corpse", "a dying man," and "inanimate, non-organic matter." Christ uses it in all three senses, referring to the actual dead, the spiritually dead, and inanimate matter.

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

neither -- "Neither" is a Greek conjunction that means "and not," and "neither/nor" when used in a series

marry, -- The word translated as "marry" means, for a man, "to take a wife" and for a woman, to "give yourself in marriage." 

nor -- "Nor" is a Greek conjunction that means "and not," and "neither/nor" when used in a series

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

given in marriage; -- "Given in marriage" is a verb from the same root as the "marry" verb above that means "to give a daughter in marriage."

but -- (CW) The Greek word translated as "but" denotes an exception or simple opposition. It is used to emphasize the contrast between things like we use "instead," "but instead,"or "rather." It is not the common word usually translated as "but." It is the Greek word "other" like we use "otherwise." Jesus almost always uses this conjunction to connect a negative clause, "not this," with a positive one, "instead this."

are -- The verb "are" 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.

as  -- The word translated as "as" has a very broad meaning, translating as "how", "when", "where", "just as", "like," and related words.

the -- (IW) There is nothing that can be translated as "the" in the Greek source. It is not needed to make the following word appear plural.  

angels -- "Angels" is a noun meaning "messenger" and "envoys" though it became to mean "semi-divine beings" in later use from its use in the NT.

which are  -- (OS) There is nothing in the Greek that can be translated as "which are" in the source we use today but it does exist in the source that the KJV translators used.

in -- The word translated as "in" also means "within", "with," or "among." With the accusative, it means "into," "on," and "for."

missing "the" -- 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. 

heaven. -- (WN) The word translated as "heaven" means sky, the climate, and the universe. It also meant the home of the gods in a physical sense: the sun, moon, and planets were named for the gods. More about the word in this article.  The word is in the plural and introduced by an article, "the skies."