οἴομαι?

[Lukas]

I am having trouble with οἴομαι. I am supposed to write, "You (singular) supposed."

1. I started out with οἴομαι.
2. I added the augment and second person passive ending to get ῳοσο.
3. The book says that the second person passive loses the sigma and contracts to ου.
4. Since it contracted, I thought there would be a circumflex on the second syllable, but the book places an acute on the first, ᾤου.

Now, on page 133, the book states, "The imperfect of οἴομαι has both the regular forms (ῳόμην, etc.) and a contracted first person singular, ᾤμην.

I cannot figure out the process as to how the answer book comes up with the answer. Did it start with one of the verbs on page 133? What is the process?

[mwh]

You should have gotten ῳεσο not ῳοσο for 2nd person.

The morphological/historical process is ᾤεσο > ᾤεο > ᾤου. The accent stays as far back as it can go.