always,usually,often,sometimes,hardly
ever和never是英语中最常见的频度副词,他们在句中的位置大致相同：通常放在行为动词之前,系动词be、助动词和情态动词之后.但是他们所表示的含义及频度各不相同.
(1)
always
的频度为100%,表示动作重复、状态继续,中间没有间断,意思是“总是”、“永远地”.
例如：the
sun
always
rises
in
the
east
and
sets
in
west.太阳总是东升西落.
(2)
usually
的频度为70%左右,意为“通常”、“平常”,即很少有例外.
例如：he
usually
goes
to
bed
at
ten
o’clock.他通常10点钟睡觉.
(3)
often
的频度为50%左右,意为“常常”,但不如usually那么频繁,表示动作重复,中间有间断.
例如：he
is
often
later
for
school.他上学经常迟到.
very
often
语气比often
重,常位于句首或句末.
例如：he
doesn’t
go
to
london
very
often.他不常去伦敦.
(4)
sometimes
的频度为20%左右,意为“有时”,表示动作偶尔发生.可以位于句首,以示强调.
例如：it
is
sometimes
hot
and
sometimes
cold.天气忽冷忽热.
sometimes
he
does
it
this
way
and
sometimes
he
does
it
that
way.
他有时这样做,有时那样做.
(5)
hardly
ever
的频度为5%左右,意为“几乎不”、“偶尔”.
例如：i
hardly
ever
go
out
these
days.这些天我几乎不出门.
(6)
never
的频度为0,意为“从来不”、“永不”.
例如：my
parents
are
never
late
for
work.我父母上班从来不迟到.
