有关reason的短语和句型

一、reason作“理由，原因”讲时，通常作可数名词，其前常与for搭配；作“充足理由”讲时，为不可数名词，后面多跟不定式。（以下例句来自Longman）
The
tower
is
closed
for
reasons
of
safety.
There
was
no
reason
to
panic.
We
have
reason
to
believe
that
the
goods
were
stolen.
Under
the
circumstances,
we
had
every
reason
to
be
suspicious.
二、reason+定语从句
a.
关系副词充当定语从句的原因状语，可以用why或that或省略。
The
reason
I
called
was
to
ask
about
the
plans
for
Saturday.
-
Longman
The
reason
why（或者that）he
doesn’t
come
is
that
he
is
ill.
——《英汉大词典》
The
reason
that
[why]
he
died
was
lack
of
medical
care.
——《用法词典》
That’s
one
of
the
reasons
he
always
gets
on
my
nerves.
——《用法词典》
备注：关系副词可以用for
which代替。
The
first
question
is
whether
the
reason
for
which
Google
considered
entering
the
wholesale
broadband
market
in
the
first
place
still
holds.
b.
关系代词充当定语从句的主语或宾语，可以用that或which，与一般的定语从句用法相同。
What
is
the
reason
that
he
gave
for
this?
What
was
the
reason
which
led
the
slaves
to
leave
the
estates
in
British
Guiana?

as
a
result所以，结果是，导致
for
no
reason没道理，另人费解地