A significant subclass of class 1 weak verbs were causative verbs.

Often the causative verb has a meaning implying "help to do"

This method of forming causative verbs is no longer productive in the modern Germanic languages, but many relics remain.

The type of explanation sought here will be based rather on the meaning of the causative verb governing the infinitive.

Other attempts have been made to deal with the types of complements found after causative verbs from a more or less "semantic" point of view (cf.

Mixtec causative verbs are indicated by the prefix s-.

There is no difference in future and present causative verbs, but the past tense is invariably indicated by adding the particle ni-.

Bemba indicates causative verbs through alternation of the stem-final consonant.

Present tense of causative verbs; stem (not root) stress.

This caused Verner alternation between the original verbs and the causative verbs derived from them.