The compound verbal modal predicate consists of a modal part and an infinitive (or a gerund). It shows whether the action expressed by an infinitive is looked upon as possible, impossible, obligatory, necessary, desirable, planned, certain, permissible, etc. In most cases it denotes the attitude to the action of the person expressed by the subject or by the speaker.
The modal part may be expressed by:
1. A modal verb:
You must forget it. I had to bite my lip to prevent myself from laughing.
2. A modal expression of nominal nature: to be able, to be allowed, to be willing, to be going, to be anxious, etc.
You are going to attend the college at Harvard. We were anxious to cooperate.
The modal part may have two modal verbs or a modal verb and a modal expression.
He may have to return. She must be willing to come here again.
З. Аn attitudinal verb such as to like, to hate, to attempt, to expect, to hope, to intend, to mean, to plan, to try, to have a mind, to wish, to want followed by an infinitive denote the attitude of the person expressed by the subject to the action denoted by the infinitive. The predicate of this type may be called a compound verbal attitudinal predicate.
He hoped to see them the next day. I mean to find out the truth.