set out 的用法?

set
off:
出发,侧重于去某个地方
例句与用法:
if
you
want
to
catch
that
train
we'd
better
set
off
for
the
station
immediately.
你要是想赶上那班火车，咱们就最好马上动身去火车站。
they've
set
off
on
a
journey
round
the
world.
他们已经开始环游世界.
set
out:
出发，开始，侧重于开始做某事，还有规划，展现的意思
例句与用法:
they
succeeded
in
what
they
set
out
to
do.
他们打算做的事已经做成了.
set
about:
开始,着手，与set
out意思相近，但set
out后加不定式，即set
out
to
do
sth,而set
about后加
ing形式，即set
about
doing
sth.
例句与用法:
1.
you
must
set
about
your
work
at
once.
你必须立即开始工作。
2.
do
you
know
how
to
set
about
going
on
this
work?
你知道怎样着手进行这项工作吗？

出发，开始做某事