anything,否定句中用anything,肯定句中用something,主要看主句。
应该选择something。
前者代表某物,后者代表任何物。
句子不能翻译为,我不认为怎么怎么,
应该翻译为 我认为怎么怎么。
就是there isnot anything 它显然不太符合含义意思
i think there's nothing in the bag, i don't think there is anything in the bag
all depends on ur language feel, i don't like to use really academic way to explan that, when you say something isn't in somewhere, use anything and when u sure something is in somewhere, use something.
simple as it is
anything,双重否定表示肯定