be careful
Used to warn someone to proceed with caution.
VERBS
be
make sb
His repeated mistakes in the kitchen have made him careful about following recipes exactly.
ADV
awfully, doubly, especially, extra, extremely, particularly, really, specially, very
You need to be especially careful with that antique vase because it breaks easily.
a bit, a little, fairly, quite | scrupulously
PREP
about
Tom is always careful about checking his email before sending important messages.
of
She was careful of the wet paint on the wall when she walked past it.
with
He is always careful with his phone because it's very expensive.