有两种表达法,一个是:can't/can not/can never be/v too +形容词/副词如:You can never be too careful to cross the road. 别一个是:can't/can not/can never be/v +形容词/副词+enough 如:I can't thank you enough. You can't be careful enough to cross the road.
never be too...to... 在结冰的路面上驾车时,怎么小心都不为过。 You'll never be too careful as you drive on a ice-covered road. 你多早开始做事都不为过。 You are never too young to start doing things