一般有三种表达法:
realize(最常用)As soon as we realized something was wrong, we moved the children away.我们一意识到出了问题,就立即把孩子们转移开了。
be aware of
Smokers are well aware of the dangers to their own health.吸烟者们都很清楚吸烟对其自身健康的那些危害。
be awake to
But voters are awake to this ruse.但是选民们觉察到了这一计谋。