Catenative verbs resemble modal and quasi-modal verbs in both form (what the verb looks like) and function (what the verb does). Like modals and quasi-modals, catenatives precede another verb. For example:
- He might bake some bread. (modal)
- She would rather see a different movie. (quasi-modal)
- You ought to comb your hair. (quasi-modal)
- Her husband wants to adopt another puppy. (catenative)
However, unlike modals and quasi-modals, catenative verbs function as the head of the verb phrase. The verb that follows a catenative functions as either a verb phrase complement or a direct object. Modal and quasi-modal verbs, however, function as modals within verb phrases. For example:
- Verb Phrase Head | Verb Phrase Complement
- decide | to dye her hair
- have | to finish his essay
- Verb Phrase Head | Direct Object
- like | reading books
- prefer | to eat fruits and vegetables
- Modal | Verb Phrase Head
- should | exercise
- used to | repair freezers
Catenative verbs further differ from quasi-modal verbs in that the preposition to functions as a particle in quasi-modals but as an infinitive marker following catenative verbs. For example:
- Modal | Particle | Verb Phrase Head
- ought | to | jog
- used | to | teach
- Catenative | Infinitive Marker | Verb
- hesitate | to | jump
- intend | to | sing
Some catenative verbs also resemble modal and quasi-modal verbs in meaning. For example, both the catenative have (to) and the modal must express obligation as in I have to finish my homework first and I must finish my homework first.