Habitual Aspect

The habitual aspect is a form of expression connoting repetition or continuous existence of a state of affairs.

Standard English has two habitual aspectual forms in the past tense. One is illustrated by the sentence I used to go there frequently. The used to infinitive construction always refers to the habitual aspect when the infinitive is a non-stative verb; in contrast, when used to is used with a stative verb, the aspect can be interpreted as stative (that is, it indicates an ongoing, unchanging state, as in I used to know that), although Bernard Comrie classifies this, too, as habitual. Used to can be used with or without an indicator of temporal location in the past (We used to do that, We used to do that in 1974); but the time indicator cannot be too specific; for example, We used to do that at 3 pm yesterday is not grammatical.

The second way that habituality is expressed in the past is by using the auxiliary verb would, as in Last summer we would go there every day. This usage requires a lexical indication of when the action occurred; by itself the sentence We would go there does not express habituality, while We used to go there does even though it does not specify when. As with used to, would also has other uses in English that do not indicate habituality: in In January 1986 I knew I would graduate in four months, it indicates the future viewed from a past perspective; in I would go if I felt better, it indicates the conditional mood.

English can also indicate habituality in a time-unspecific way, referring generically to the past, present, and future, by using the auxiliary will as in He will make that mistake all the time, won't he?. As with used to and would, the auxiliary will has other uses as well: as an indicator of future time (The sun will rise tomorrow at 6:14), and as a modal verb indicating volition (At this moment I will not tolerate dissent).

Habitual aspect is frequently expressed in unmarked form in English, as in I walked to work every day for ten years, I walk to work every day, and I will walk to work every day after I get well.