There is a small class of transitive verbs that cannot be marked in the passive voice. 4. The potato was eaten by John. 5. *Be flying some birds. 6. *Hank's father is resembled by Henry. In the ...

When the subject of a sentence isn't doing something, the verb is passive. On the other hand, a sentence is active when the subject performs the verb (action). For example, in this sentence the ...