Question

一道语法题，希望说出选正确答案的原因和不选其它答案的理由。

To handle the delicate situation, you must be____________
A) more than careful
B) more carefully
C) carefully enough
D) enough carefully

Answer 1

答案是A: To handle the delicate situation, you must be more than careful. 为了对付这微妙的局势，你必须非常小心。 用形容词careful 作表语, carefully是方式副词, 不可以作表语。
more than = extremely
《牛津高阶英汉双解词典》more：
I‘m more than happy ( = extremely happy).

Answer 2

选B，这个是比较级用法，carefully的比较级用法只能用more，强调时可以是much more carefully

Answer 3

此题没有答案，正确答案为：more careful than before或careful enough.因为此句缺少表语，而只有形容词才可以做表语，carefully是副词不能做表语。而用比较级的话，必需把more 与than分开，并且后面有比较的对象。

Answer 4

选A
其他选项都是副词carefully，直接排除。
A项是形容词的比较级，是比“你本身就careful”还要更加careful，把省略部分补充全就是：
To handle the delicate situation, you must be more (careful) than (you are) careful.

Answer 5

选A。理由如joham50 所说。也有的资料书认为more than+形容词时more than 相当于very.