From Longman Dictionary of Contemporary Englishjust have to do somethingjust have to do somethingused to say that someone has to do something because nothing else is possible We’ll just have to watch and see what happens. You just have to accept things and get on with your life. → just
Examples from the Corpus
just have to do something• You can have it right back if you want it, you just have to ask.• We just have to do some more throat swabs.• My uncle said that now we ha-ha just have to do this.• She would just have to get out and walk.• I just have to get somewhere soon to sleep.• You don't just have to listen to stories.• That's the trouble with doing all these films and tellies - you just have to remember a little bit for a short take.• Sometimes you just have to tell people what s best for them. 