can't but

cannot but

Must. A phrase used when something is very likely to happen. I cannot but study for this exam—it counts for half of our grade!
See also: but, cannot

can't but

A phrase used when one feels very strongly compelled to do something. We can't but intervene here, before you throw your life away on drugs! My mom can't but meddle in my love life, even though I'm 30 years old!
See also: but

can't but

Also, cannot but. See can't help.
See also: but