题目内容：

为什么句子中都用try not to do sth
例如I'll try to study harder变为否定句成了
I'll try not to study harder.为什么不否定前移了?

优质解答

try to do sth尽力做某事,try not to do sth尽力不做某事
not try to do sth. 不愿尽力做某事