The going-to future is a grammatical construction used in English to refer to various types of future occurrences. It is made using appropriate forms of the expression to be going to. It is an alternative to other ways of referring to the future in English, such as the future construction formed with will (or shall) – in some contexts the different constructions are interchangeable, while in others they carry somewhat different implications. Constructions analogous to the English going-to future are found in some other languages, including French, Spanish, Swiss German, and some varieties of Arabic.
Origin The going-to future originated in the late 15th century by the extension of the spatial sense of the verb go to a temporal sense (a common change, the same phenomenon can be seen in the preposition before). From a 1483 publication pertaining to Adam of Eynsham, a medieval English chronicler, an instance of this construction is present: Thys onhappy sowle..was goyng to be broughte into helle for the synne and onleful lustys of her body. The original construction involved physical movement with an intention, such as "I am going [outside] to harvest the crop." The location later became unnecessary, and the expression was reinterpreted to represent a near future.
Contracted forms The going to future construction is frequently contracted in colloquial English, with the colloquial form gonna and the other variations of it resulting from a relaxed pronunciation. Furthermore, in some forms of English, the copula may also be omitted. Hence "You're going to be" could be said as "You're gonna be" or just "You gonna be". In the grammatical first person, I'm gonna (which is, in full, I am going to) may further contract to I'm'n'a or Imma . These contracted forms can provide a distinction between the spatial and temporal senses of the expression: "I'm gonna swim" explicitly carries the temporal meaning of futurity, as opposed to the spatial meaning of "I'm going [now] [in order] to swim", or "I'm going [in the pool] to swim".
Formation The going-to idiom, used to express futurity is a semi-modal verb that consists of a form of the copula verb be, the word going followed by the word "to", for instance is going to. Like other modals, it is followed by the base infinitive of the main verb (compare with "ought to".) (An alternative description is that it uses the verb go in the progressive aspect, most commonly in present progressive form, serving as an auxiliary verb and having the to-infinitive phrase as its complement. However this description fails to take into account sentences in which the main verb is elided, such as "Yes, he's going to.") It can be put into question and negative forms according to the normal rules of English grammar. Some examples:
The boys are going to fight. (subject the boys + copula are + going to + base-infinitive fight) I'm going to try the wine. (subject I + copula am + going to + base-infinitive phrase try the wine) He's not going to make it. (negative form, copula negated with the addition of not) Are you going to bring Sue? (interrogative form, featuring subject–auxiliary inversion) Aren't they (more formal: Are they not) going to wear coats? (negative interrogative form) We were going to tell you earlier. (past form of the going-to future, formed with the past copula were) Yes, I'm going to. (main verb is elided). That the verb go as used in this construction is distinct from the ordinary lexical verb go can be seen in the fact that the two can be used together: "I'm going to go to the store now." Also the lexical use of going to is not subject to the contractions to gonna and similar: "I'm gonna get his autograph" clearly implies the future meaning (intention), and not the meaning "I'm going [somewhere] [in order] to get his autograph."
Usage The going-to future is one of several constructions used in English to refer to future events (see Future tense § English). The basic form of the going-to construction is in fact in the present tense; it is often used when the speaker wishes to draw a connection between present events, situations, or intentions and expected future events or situations, i.e. to express the present relevance of the future occurrence. It may therefore be described as expressing prospective aspect, in the same way that the present perfect (which refers to the present relevance of past occurrences) is said to express retrospective (or perfect) aspect. There is no clear delineation between contexts where going to is used and those where other forms of future expression (such as the will/shall future, or the ordinary present tense) are used. Different forms are often interchangeable. Some general points of usage are listed below.
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