The auxiliary of going combines with bare infinitives of body posture. Verbs of body posture are: sitte ‘sit’, stounde ‘stand’ and läze ‘lie’. Some examples are given below:

The second example illustrates that there is also idiom formation, indicating that there has been clause union. The examples also indicate that the verb of going selects a bare infinitive, that is, an infininitive in schwa, not the gerundial infinitive ending in –n. This is interesting, because the verb of going in West Frisian selects the gerundial infinitive. The verb of going characteristically combines with verbs of body posture. However, it combines with other verbs as well:

There is also the following example, involving the combination of the auxiliary of going with a preposed verb of activity:

This is an example in which the main verb and the verb of going have been preposed. Remarkably, the verb of going now selects the gerundial infinitive. The example is from poetry (source: [GesLechSie-SeeKroune 1977]). Consider also the following example:

Again the gerundial infinitive is used, and it again involves a verb that is not a verb of body posture. An infinitive may also be left dislocated, and resumed by means of resumptive pronoun, as in the following example:

The infinitive has the form of an ordinary infinitive, presumably because it counts as a citation infinitive. The resumptive pronoun satisfies the selection restrictions of the verb of going.

To sum, if the auxiliary of going combines with a bare infinitive, the bare infinitive almost always involves a verb of body posture. This is usually found in older sources, and it is going out of use. Instead of sitte gunge ‘go sit’, the Low German loan sik sätte ‘set oneself’ is now quite current. When the verb of going combines with an activity verb, the main verb infinitive doesn’t have the form of an ordinary infinitive but of a gerundial infinitive.

The combination of the verb of being with a to-infinitive was already discussed in: VP > Types of to-infinitival constituents >Reduced and full to-infinitives of purpose (4.5). What is notable is the following. If the auxiliary of going selects a to-infinitive, the to-infinitive is not accompanied by any other material. There are no objects, there is no middle field, there are no accompanying adverbials. The infinitival constituent is found to the right of the verb cluster. An example is given below:

So if the verb of going selects a to-infinitive, it must be an infinitive without a middle field.

The verb of going can also select a PP infinitive (Laker & Kramer 2022). Some examples are given below:

The last sentence features an object incorporation. Both sentences are impersonal, and they have an ingressive meaning: they express the beginning of an ongoing action. The construction can also have a personal subject, as in the following example:

This is a peculiar example. The implied object of the PP infinitive is present in the middle verb of the verb of going as a PP of location. In 19th century sources, there is a variant of the construction featuring the indefinite article:

The construction tends to be impersonal. Thus it is chiefly used to mark the beginning of an ongoing activity without the participants in the action (subject and object) being expressed.