Simple Q&A D&D 3.5 (by RAW) XXII

[rockdeworld]

A189
By RAW, it could be any of those. The reading implies that it should be the action that would have been required to cast the spell on your next turn, normally a Standard Action for a spell, or a free action if you already have Shapechange cast.

A190 (Nettlekid)

Upon changing, the subject regains lost hit points as if it had rested for a night (though this healing does not restore temporary ability damage and provide other benefits of resting; and changing back does not heal the subject further). If slain, the subject reverts to its original form, though it remains dead.

The subject gains the Strength, Dexterity, and Constitution scores of the new form but retains its own Intelligence, Wisdom, and Charisma scores.

Relevant bits highlighted. No, ability damage doesn't carry over, because you get the new form's physical ability scores. Yes, you retain it when you change back.

A191 (ninjamaster1991)
Yes, since the medium size creature is within 1 size category of the lycanthrope at the time the ability activates.

A192 (willpell)
No, by RAW you can't do that because Dragons don't have the ability to trade features from their first HD for class features like Humanoids do.
Edit: The posts below indicate this isn't a simple question, but a controversial topic that may deserve its own thread.

A106
You share the Time Stop, as the feat's name suggests. The spell Time Stop only makes you move very quickly for 1d4+1 rounds. The two still can't target each other with spells or attacks, as per the text of Time Stop.