Question

What were you doing at these times?意思,times为何+s ?

Answer 1

这是at
……times这个固定用法，意思即在……时候
相关短语
Safety
procedure
shall
be
followed
at
all
the
times.在任何时候都应遵守安全程序
Every
man
is
fool
sometimes,but
none
at
all
the
times!每个人都有愚蠢的时候
at
the
following
times在以下的时间
Eat
at
the
right
times
of
the
day.在正确的时间进餐
at
times
the
wrongs
mouth出生富贵
at
the
best
of
times在最有利的情况下；当情况最佳时
even
at
the
best
of
times即使在最有利的情况下
Martin
Wolf,
Great
Britain
(associate
editor
and
chief
economics
commentator
at
the
Financial
Times)马丁?沃尔夫
have
regular
habits/be
regular
in
one's
habits,
ie
do
the
same
things
at
the
same
times
every
day作息时间有规律
at
different
times
of
the
day在一天的不同时间

Answer 2

你好！
这些时间你在做什么？这段时间不可能只做一个动作，其实是分开成很多的小时间来利用的，所有就是有很多种的
时间了
，所以
time
要加
s
，times。
仅代表个人观点，不喜勿喷，谢谢。