SHOULD /
SHOULDN’T – expressing your opinion (criticism)
We use should when we think something is a good idea, but the person is not doing it.
We use shouldn’t when we think something is a bad idea, but the
person is doing it.
It’s your opinion,
so you are criticising their choice.
Examples:
So, should
is not just advice – it’s a soft criticism of what someone is doing or
not doing.
HAD BETTER /
HAD BETTER NOT – real advice for someone’s benefit
We use had better when we really care about the person’s well-being or situation.
There’s often a clear reason or even a consequence if they don’t
follow the advice.
You give this
advice because it’s important – not just your opinion.
Examples:
You had better take a break – you look exhausted.
The short form is 'd better, e.g. I'd better, I'd better not.