Handwriting's on the Wall!

In addition to the Active Verb Forms already up on the left side of our classroom wall, we added the Passives this morning to the right side of the room. With that, we now have all 24 forms of the English verb--active and passive voice, past and present and future tenses, both simple and continuous aspects. The trick, of course, is to know it at the back of one's hand, to be able to convert the active to passive, and vice versa, on the fly.

Some of these verb forms are obviously clumsy to use and not too frequently used. Can you identify them? List them in your Comments below.