PAST MODALS

1. They shuold have researched the technology more thoroughly
2. They may have wasted money developing their own systems.
3. They should have know the system was going to be too expensive.
4. They should have stopped the project before it was too late.
5. They could have designed lighter hansets.
6. They should have charged less for calls
7. They could have conducted a more successful marketing campaign.
8. They shouldn´t have spent so much time and energy.
9. They may have miscalculated the size of the potentional market.