defective verb

A few irregular or defective verbs (meminisse 'remember') used this form as their only imperative.

On the other hand modal verbs (such as can and must) are defective verbs, being used only in a limited number of forms.

With famine and a Constitutional theory of defective verbs going on, all other excitement is conceivable.

Some grammarians treat these as different defective verbs, while others consider them a single word with stem allomorphy.

In most cases, a synonym for the defective verb must be used instead (i.e. "to be able to").

Welsh has a handful of defective verbs, a number of which are archaic or literary.

A defective verb is a verb that lacks some grammatical conjugation.

Sometimes known as a defective verb, impersonal verbs are conjugated in the third person only.

In English, defective verbs generally show no agreement for person or number, they include the modal verbs: can, may, shall, will, must, should, ought.

Moreover, if the future does not exist (defective verbs) neither will the conditional.