"should sometimes" is correct and can be used in written English.
Example: Taking time out to relax can be beneficial and should sometimes be prioritized over working.
People no longer even have a language to explain why freedom should sometimes be limited.
Sometimes I've thought he should, sometimes I've decided that he shouldn't.
PARIS — Epochal pronouncements from rock stars should sometimes be taken with a dose of skepticism.
She says "I think people should sometimes do things that are difficult and unpleasant".
They should sometimes focus on the lives we have saved and positively changed".
He believes that the EU should sometimes use its weight to support the US, sometimes to counter-balance the US.
Or is it situational and outcome-aware, so that we should sometimes improvise to take account of special circumstances?
"Scientists are always looking for answers and then putting them into grammatical form when they should sometimes be put into image form.
The first is whether patients who are able to make decisions about their own treatment should sometimes be compelled to take medication.
If governments assumed that even the disabled should sometimes work for their welfare, the truly disabled might be the most grateful of all.
But as William Galston of the Brookings Institution jokes, government should sometimes be shrouded for the same reason that middle-aged people should be clothed.
