Forming a Subjunctive

Greek Learning Greek
1

Χαίρετε!
I do not think I am understanding the process of forming a subjunctive. In chapter 32, page 281, Part I of the exercises of Dr. Mastronarde’s work, I am stuck on the third one. I am supposed to write the 2nd aorist active of be a slave. Here are the steps I took:

  1. the first person of be a slave = δυλεύω.
  2. 2nd aorist active = ἐδύλευσας.
  3. The theme vowel is η.
  4. According to Appendix A: α+ η = a long α
  5. The 2nd aorist active is ἐδύλευσας.
  6. I lengthen the vowel α+ η = a long α
  7. My answer is δυλεύσας, with a long α.
  8. The answer book says it is δουλεύσῃς.
    I am using the wrong procedure somewhere. What is the procedure to go from an indicative verb to a subjunctive?
    I just read again about the formation and am wondering if my mistake was using an alpha. Maybe I should have used the primary ending ῃς. I may have answered my own question.
2

To form the subjunctive of an indicative you substitute the appropriate subjunctive ending for the indicative one, and if there’s an augment you remove it.
E.g. δουλεύω indic. > δουλεύω subjunctive
ἐδούλευσας indic. > δουλεύσῃς subj.
(δουλεύσας is the participle.)

3

In addition to what mwh wrote, note that the verb is δουλεύω, not δυλεύω.

4

If I may ask a question about the Aorist Passive Subjunctive, Dr. Mastronarde writes on page 276, “Aorist Passive Subjunctive. In this inflection, the active endings are added to the
aorist passive stem in its short-vowel form (e.g., λυθε- from ἐλύθην, φανε- from
ἐφάνην). The conjugation (λυθῶ, λυθῇς, etc.; φανῶ, φανῇς, etc.) is thus exactly like
that of the subjunctive of ποιέω or τίθημι under §2a, above.”
Can I figure from this that a circumflex accent falls on the theme vowel for all Aorist subjunctives or does it vary?