ago，before，after，until，till等的区别

Question

如题所述

Answer 1

until（till）
up
to
the
time
when
主句动词为延续时常用肯定till或until,若为瞬间或位转时常用否定not...until(till)
till
用于口语，但不能用于句首引导从句。until用于句首，从句常用一般
事实时态
。
wait
until(till)
the
rain
stops.
don't
leave
till
i
arrive.
i
won't
stop
shouting
until
you
let
me
go.
until
she
spoke
i
hadn't
realized
she
was
foreign.
i
stayed
there
until
(till)
she
arrived.
i
didn't
know
that
until
he
told
me.
before
earlier
than
the
time
when
免得do
it
before
you
forget.
……就it
is
not
a
long
time
before
she
came.
宁愿i'd
shoot
myself
before
i
apologized
to
him!
才
it
was
mid-night
before
she
came
back.
it'll
be
a
long
time
before
i
finish
this
grammar
book.
it
may
be
many
years
before
we
meet
again.