In three hours 在三小时内
In five minutes 在五分钟内
In the morning 在早上
In the afternoon 在下午
In the evening 在傍晚
At once
At midnight 在午夜
At night 在晚上
At dusk 在黄昏时分
At noon 在中午
At dawn 在黎明时分
At 7 o'clock
At 6pm
At 8:15 am
At 5:28 pm
On Monday
On Tuesday
On the weekend
On October 20th, 2018
In 2018
In October 2018
In October
at the moment眼下 当前
for the moment 暂时 目前
at this/that moment在此、那时
at this moment in time此时此刻
just this moment刚刚 方才
in a moment立刻 马上
for a moment一会儿
wait/just a moment稍等一小会儿
the last moment最后一刻
all the time一直，始终
at the same time同时
from time to time有时，不时，偶尔
in time及时
on time按时
many a time多次
have a hard time（in）doing sth做……很困难
at a time每次，一次
at one time曾经，一度
at no time从不，决不
in no time立即，马上
Up to that time 直到那时
Till 10 pm 到下午十点
Put off 推迟
