What's the difference between:
What should we be doing if
theinflation goes up?
What should we do if inflation goes up?
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The progressive form here indicates an increased concern about the problem. The progressive makes the action more immediate to perception.
I wouldn't suggest this construction to refer to a conditional, hypothetical future.
However, it can be used in such examples:
The second fits in here best:
The first would fit in good enough if it were constructed this way: