cannot…too
impossible for a certain state or action to be more than what should be or to be beyond what is desirable无论怎样也不过分
You cannot be too careful．你越小心越好。（你无论怎么小心也不为过分。）
A man cannot have too many friends．朋友越多越好。
The bad habit cannot be got rid of too soon．这个坏习惯改得越早越好。