The boss suggested (that) we leave early.
The boss suggested (that) we should leave early.
It is vitally important (that) you should take this medication night and morning.
It is vitally important (that) you take this medication night and morning without fail.
It is vitally important (that) you should take this medication night and morning.
It is vitally important (that) you take this medication night and morning without fail.
They advised that he not return to work until fully fit.