1. When this had been done, he appeared to be satisfied.
2. This having been done, he appeared to be satisfied.
3. This done, he appeared to be satisfied.
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Can we use all the expressions? Are they the same?
4. When our dinner was over, we went out for a walk.
5. Our dinner being over, we went out for a walk.
6. Our dinner over, we went out for a walk.
(Which one is better, #5 or #6?)
1 and 3 are fine; 2 is awkward (okay, but awkward).
4 is best.
5 is okay, but awkward.
6 is not good.