一、concern作动词
1.
关系到；影响
the
world
cup
taking
place
in
germany
concerns
all
the
fans
throughout
the
world.
在德国举行的世界杯足球赛影响到全世界所有的球迷们。
注意：其过去分词concerned常用来作表语，意为“和……有关；牵涉”；而作定语，则意为“有关的”。
it
is
reported
that
the
pop
singer
is
concerned
with
selling
drug.
据报道，那个流行歌手涉嫌贩毒。
he
asked
all
concerned
to
take
an
active
part
in
helping
the
girl.
他要求所有相关的人积极帮助那个女孩。
2.
使担心；使关心；使烦恼
the
boy's
poor
performance
at
school
concerned
his
parents.
这个男孩在学校很差的表现，使他父母很担心。
注意：其过去分词concerned通常作形容词用，意为“担心的；烦恼的；忧虑的”。
the
concerned
parents
were
all
concerned
for
the
children's
safety.
忧心忡忡的家长们都为孩子们的安全担忧。
二、concern作名词
1.
有关……的事（可数）
that's
my
concern,
so
i'll
do
as
i
like
about
it.
那是我的事，因此，我想怎么做就怎么做。
2.
关怀；关心（不可数）
some
people
don't
show
much
concern
for
our
environment.
有些人不太关心我们的环境。
3.
焦急；忧虑（不可数）
there
is
now
considerable
concern
for
their
illness.
现在对他们的病相当担心。
4.
对某人来说最重要或最感兴趣的事（可数）
what
are
your
main
concerns
as
a
golf
player?
作为一个高尔夫球员，你最关心什么？
5.
企业；公司；商行（可数）
tcl
is
a
large
concern
in
our
country.
tcl
是我们国家的一个大企业。
6.
股份(可数)
many
managers
have
concerns
in
their
businesses.
许多经理在企业中都占有股份。
三、concern常用的习惯搭配
1.
concern
oneself
with
/
in
/
about
sth.
忙于某事；关心某事
there's
no
need
to
concern
yourself
with
this
matter;
we're
dealing
with
it.
你不用管这事，我们正在处理它。
2.
so
/
as
far
as...
be
concerned就……来说
/
而论
so
far
as
i
am
concerned
the
second
arrangement
is
more
suitable.
对我来说，第二种安排更恰当。
3.
be
concerned
with
/
in...
与……有关
her
latest
documentary
is
concerned
with
youth
unemployment.
她最近的一部纪录片与青年人失业有关。
4.
where...be
concerned
在牵扯到……的时候
/
情况下
where
work
is
concerned,
i
always
try
to
do
my
best.
在涉及到工作的时候，我总是尽我的最大努力。
参考文献：
http://hi.baidu.com/gubiting/blog/item/2d24c1f96768755c252df217.html