Infinitive Complex Subject

Complex Subject

Noun/Pronoun + Predicate + Infinitive

The combination of a noun in the common case (or a pronoun in the nominative case) and an infinitive forms a complex subject (1).
The predicate which is usually expressed by a verb in the passive voice  is placed between the noun and the infinitive. The relation between the noun and the infinitive is that of subject and predicate.

Note 1: - According to another interpretation the subject is expressed by a noun or pronoun and the infinitive is regarded as a part of the predicate.

Key examples:

• He is said to be a good teacher. 
• The boy is known to have passed his exams well. 

The predicate in sentences with a complex subject can be expressed by:

Infinitive Complex Object

Complex Object 

Subject + Predicate + Complex Object (Noun/Pronoun + Infinitive)

The combination of a noun in the common case or a pronoun in the objective case and an infinitive used after the predicate forms a complex object. The relation between the noun (pronoun) and the infinitive is that of subject and predicate.

Key examples:

• I saw the boy raise his hand. 
• I heard him call my name. 
• I want you to know that it doesn't matter.