~ないと (must, casual)

If you go to Hokkaido and don't eat the seafood, there's no point in going.

'Hey, what time's the dorm curfew again?' '21:00.' 'Crap, I won't make it unless I run.'

Cough syrup. I can't relax unless I take a sip before a performance!

If you're someone who stands above others, you really ought to give that point at least a little consideration.

Nothing satisfies her unless it goes exactly her way.

I need to find the cause quickly, fix my slump, and live up to Senior Tanizaki's expectations.

It's fine, forget it. More importantly, if we don't hurry, the time sale's gonna end.

"What are you doing?" "The household ledger. Our finances are tight, so I've got to be strict about this kind of thing."

I've got to wrap up Sis's dinner in plastic wrap before I forget.

Still, if it's every single day, you'd get sick of it even so. I'll have to expand my cooking repertoire.

Leaving it to others won't do. I'm no lifeguard, but I've got to take care of them myself.

Today's a school day. I'd better not be late...

We need to allow for the train running late.

You need to be more careful when you're playing baseball.

I've got to head out early tomorrow morning, you know.

If you don't study, you'll fail the exam.

Unless you wait a bit, the additions and deletions won't be reflected.

You have to invite him, you know.