Auxiliary verb is a verb that gives further semantic or syntactic information about a main or full verb

Non-Indo-European languages

In many non-Indo-European languages, the functions of auxiliary verbs are largely or entirely replaced by suffixes on the main verb. This is especially true of epistemic possibility and necessity verbs, but extends to situational possibility and necessity verbs in many indigenous languages of North America, indigenous Australian languages and Papuan languages of New Guinea.

Hawaiian Creole English

In Hawaiian Creole English, a creole language based on a vocabulary drawn largely from English, auxiliaries are used for any of tense, aspect, and modality expression. The preverbal auxiliary wen indicates past tense (Ai wen see om "I saw him"). The future marker is the preverbal auxiliary gon or goin "am/is/are going to": gon bai "is going to buy". These tense markers indicate relative tense: that is, past or future time relative to some benchmark that may or may not be the speaker's present (e.g., Da gai sed hi gon fiks mi ap "the guy said he [was] gonna fix me up". There are various preverbal modal auxiliaries: kaen "can", laik "want to", gata "have got to", haeftu "have to", baeta"had better", sapostu "am/is/are supposed to". Waz "was" can indicate past tense before the future marker gon and the modal sapostu: Ai waz gon lift weits "I was gonna lift weights"; Ai waz sapostu go "I was supposed to go". There is a preverbal auxiliary yustu for past tense habitual aspect : yustu tink so "used to think so". The progressive aspect can be marked with the auxiliary ste in place of or in addition to the verbal suffix -in: Wat yu ste it? = Wat yu itin? "What are you eating?" Ste can alternatively indicate perfective aspect: Ai ste kuk da stu awredi "I cooked the stew already". Stat is an auxiliary for inchoative aspect when combined with the verbal suffix -in: gon stat plein "gonna start playing". The auxiliary pau without the verbal suffix indicates completion: pau tich "finish(ed) teaching". Aspect auxiliaries can co-occur with tense-marking auxiliaries: gon ste plei "gonna be playing"; wen ste it "was eating".

Hawaiian

Hawaiianchis an isolating language, so its verbal grammar exclusively relies on unconjugated auxiliary verbs. It has indicative and imperative moods, the imperative indicated by e + verb (or in the negative by mai + verb). In the indicative its verbs can optionally be marked by ua + verb (perfective aspect, but frequently replaced by the unmarked form); ke + verb + nei (present tense progressive aspect; very frequently used); and e + verb + ana (imperfective aspect, especially for non-present time).