It is important to realize that the future middle indicative forms characterize only future middle indicative verbs. The future passive indicative is indicated by a different set of suffixes. In fact, the future middle indicative falls under the second principal part, while (as we will come to understand later) the future passive indicative falls under the sixth principal part because of the way it is formed.

Translating future middle indicative verbs is similar to translating present middle indicatives. The difference, of course, is in the tense. One still needs to keep in mind the different uses of the middle voice, but be sure to indicate the future tense through the use of the English helping verbs "will" or "shall."

You will also notice that there are many indicative verbs that are deponent in the future tense. We will devote a section below to future deponents. 

The future middle indicative suffixes are built from the primary middle suffixes. As such, the fut mid ind suffixes look almost exactly like the pres mid/pass ind suffixes, except for the fact that in the future there is the addition of a sigma-infix throughout.

For this reason, you basically already know the future middle indicative suffixes!

Given the presence of the sigma-infix, you will recall that a number of modifications to the stem will often occur. This is a good point to review the patterns of amalgamation (cf. Black, Learn §20; and Future Active Indicative).

All we have learned about present middle/deponents applies here as well. Future deponents have middle forms but active function.

With future deponents, however, you will not usually find one listed as a lexical entry within a lexicon (unless you are using a lexicon such as the Shorter Lexicon of the Greek New Testament; and for this reason I highly recommend this as a useful all-in-one tool for translating that you can carry with you anywhere--just contact the ATS Bookstore to order a copy). If you have a hunch that you are dealing with a future middle/deponent form, you can also turn to a principal parts chart (or "verb bank," as I sometimes like to call it) and see if the verb listed under the second principal part has a future middle instead of a future active form. If a future middle form is listed, then you are dealing with a future middle/deponent.

It is impossible predict whether the second principal part for a particular verb will be a future deponent. One can only determine this on a case-by-case basis through observation.

(1) Some verbs are deponent in the present and future tenses:

               gi,nomai         »        genh,somai
               e;rcomai         »        evleu,somai

In the second example, you will notice that the future middle/deponent may also be identified as a suppletive.

(2) Some verbs are "regular" in the present tense, but "become" deponent in the future tense:

               ginw,skw       »       gnw,somai
               katabai,nw    »       katabh,somai
               lamba,nw        »       lh,myomai

Once you have learned the future indicative of EIMI you will have mastered the whole conjugation of the verb EIMI in the indicative mood (there is still more to learn later on, such as the present subjunctive of EIMI and the present paticiple of EIMI).

Exception: the third person singular form is irregular since the connecting vowel (e) that one might expect between the sigma and the tau is not there.

In the English sentence, "It is good to walk in the way of righteousness," the word "it" acts as a preparatory subject that introduces the real subject of the sentence, the infinitival clause "to walk in the way of righteousness." The adjective "good" is the predicate. This customary way of speaking in English is useful for translating certain constructions in Greek that would otherwise not come off as smoothly in translation. For example, observe Peter's words on the Mount of Transfiguration (Mark 9:5):

r`abbi,( kalo,n evstin h`ma/j w-de ei=nai
Rabbi, it is good for us to be here

The infinitive (along with its subject "us" [in the acc. case] and the adverb "here") is the subject of the sentence. The predicate consists of the verb EIMI and a predicate adjective in the nominative case. The best way to translate this construction is by using a preparatory "it" in English.

The preparatory "there" is used in like manner. Observe how both Simeon and Anna are introduced in Luke 2:25 and 36:

Kai. ivdou. a;nqrwpoj h=n 
evn VIerousalh.m w-| o;noma Sumew.n
And behold, there was a man
in Jerusalem by the name of Simeon

Kai. h=n {Anna profh/tij
And there was a prophetess, Anna