22g Make the verb agree with its subject even when the subject follows the verb.

Verbs ordinarily follow subjects. When this normal order is reversed, it is easy to become confused. Sentences beginning with there is or there are (or there was or there were) are inverted; the subject follows the verb.

Occasionally you may decide to invert a sentence for variety or effect. When you do so, check to make sure that your subject and verb agree.

The example reads,

Of particular concern (strikethrough) is (end strikethrough) (insert) are (end insert) penicillin and tetracycline, antibiotics used to make animals more resistant to disease.

Text below reads, The subject, (Italics) penicillin and tetracycline (End Italics), is plural, so the verb must be (Italics) are (End Italics).