Grammar question

Test Preparation SAT Preparation
1

<p>Saw this somewhere:</p>

<p>If the infinitive “to be” has no subject, the noun or pronoun that comes after the infinitive is in the nominative case. </p>

<p>My twin brother is often thought to be I (nominative case). </p>

<p>What is “twin brother” the subject of? Often thought? </p>

<p>Here’s a different one with the objective case.</p>

<p>Pat didn’t expect my friend to be him.</p>

<p>Here, I guess “my friend” is the subject of to be. But I’m not too sure why my twin brother is not the subject of “to be” in the first example.</p>

2

<p>This won’t show up on the SAT, but “twin brother” is the subject of “is thought.” “…to be I” says in what way the twin brother is thought. The twin brother cannot be the subject of “to be” because the twin brother is not being anything.</p>