1. The dog would have barked if it  have beenhave puthave seenwould have placedwould have stopped a starnger.(see).

2. If there  have beenhave puthave seenwould have placedwould have stopped sufficient light, I would have taken some photographs. (be).

3. The soup would have tasted better if you,  have beenhave puthave seenwould have placedwould have stopped more salt in it.(put).

4. If I had found the samples satisfactiry, I  have beenhave puthave seenwould have placedwould have stopped a huge order.

5. Had I seen the red signal, I  have beenhave puthave seenwould have placedwould have stopped the car. (stop)