Learn English – “Who” versus “whom” with multiple verbs

grammar

Which of these phrases is more correct?

The man who I know to be unhappy

The man whom I know to be unhappy

Is one of the verbs in the phrase more important, thus determining the noun case, or is something else happening with the particular combination of verbs? (The man whom I know is valid but the man to be unhappy isn't; the tense must be specified as in the man who is unhappy.)

Best Answer

In this instance, the pronoun "who" is the object of the verb "know". So you want to use objective case whom.