I、at times "不时；偶尔" at times = sometimes （ "有时","时常","多次" ）， 如：
The tide is , at times, very high. 潮水有时涨得高。
I make mistakes at times when I speak English. 我说英语偶尔会出错。
She does good works at all times. 她的工作总是干得很好。
Ⅱ、at all times."随时；任何时候；总是" at all times = always （"总是","随时","一直" ）如：
He has a cool head at all times. 他随时都有清醒的头脑。
The baby cries all the time. 那婴儿一直哭。
Ⅲ、all the time "一直；始终" 其中time用单数形式。如：
I feel a little nervous at times. 我有时候会觉得有点紧张。
At times Jean's mother lets her hold the baby. 珍妮的妈妈有时候会叫她抱小孩。