Similar to the Infinitive Participle I may form part of a Complex Object or Subject when combined with a noun (pronoun) to which it stands in predicate relation.

Compare:

• I saw him run along the street. (Infinitive Complex Object) � He was seen run along the street. (Infinitive Complex Subject)
• I saw him running along the street. (Participle Complex Object) � He was seen running along the street. (Participle Complex Subject)

Such complexes occur after verbs denoting physical perceptions � 'to see', 'to hear', 'to feel', 'to watch', 'to find', 'to catch'.
Read more �