Only True Shape Enthusiasts Will Understand The Genius Of The 7 Sides Shape.

In only when , there is a sense of urgency, a slightly more 'involved' writing. It was only when is by comparision more 'relaxed' writing, more like someone is recounting something to someone. The question asks for a general answer but gives only one special context.

*they but only work that way occasionally. I can only do so much in this time. Or i can do only so much in this time. When only after, only if, only in this way etc. Are placed at the beginning of the sentence for rhetorical effect, the subject and auxiliary are inverted: Only after lunch can you play.