Grammar Q: Which of these two is correct?

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1

<p>Why are Bob and Sally working together? </p>

<p>Why is Bob and Sally working together?</p>

<p>What is the subject of these two sentences?
(Sorry, English is my second language)</p>

2

<p>Are because it signifies there is more than one subject.</p>

3

<p>The subject is Bob and Sally. Therefore, are is correct.</p>

4

<p>Compound subjects are plural. Bob and Sally is a compound subject.</p>

5

<p>(Don’t forget that only “and” can make a compound subject–synonyms for “and” cannot.)</p>