an
hour
and
a
half或者
one
and
a
half
hours
two
hours
and
a
half/two
and
a
half
hours
用is，因为时间不可数，虽然小时可数：
离天亮还有两个半小时。
It
was
two
and
one-half
hours
to
dawn.
你的展示预定在一个半小时之后开始。
Your
demo
is
scheduled
to
start
in
an
hour
and
a
half.
世海明天要/会学中文学一个半小时。
Tomorrow
Shihai
will
study
Chinese
for
one
and
a
half
hours.
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