be
careful
with强调的是对干什么要认真,谨慎
例句：you
must
be
careful
with
that
vase,
it
is
ver
fragile.
你要小心对待那个花瓶，因为它很易碎
be
careful
abou强调的是要当心、小心，对..提高警惕
例句:
everyone
should
be
careful
with
fire
when
using
it.
每个人都应该谨慎用火
be
careful
in用法和be
careful
with用法近似
be
careful
of强调对...认真，细心，小心（比较褒义）
例句：you
are
very
careful
of
your
work.你对你的工作很谨慎/认真
it
is
really
careful
of
you
你很认真（褒义）
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