Not a single case of T.B. was found in the x-rays studied.
请教老师，not开头的句子的意思？谢谢老师。
这是一种强调说法，意思是“一个……也没”。又如：
Not a single sound was heard. 一点声音也没听到。
Not a single soldier was killed. 没一个士兵阵亡。
Not a single sound fell from her lips. 她一个字也没说。
Not a single person offered to help her. 没一个人主动出来帮她。
Not a single student in the class got the problem out. 班上无一人解出这道题。
Not a single one of her neighbours gave her any help. 没一个邻居帮过她忙。
Not a single missile got through the defense system. 没一枚导弹突破该防御系统。
注：当坐落于句首的 not a single…不是用作主语时，其后要用倒装语序。中：
Not a single fish did he catch the whole afternoon. 他整个下午一条鱼 也没捕到。
Not a single man did he see on the street in such cold weather. 这么冷的天，他在街上一个人也没见到。
