我丝毫不担心他的考试成绩。
wǒ sīháobù dānxīn tāde kǎoshì chéngjì 。
I am not worried at all about his exam results.
她丝毫没有改变主意。
tā sīháo méiyǒu gǎibiàn zhǔyì 。
She hasn't changed her mind in the slightest.
这件事丝毫不重要。
zhè jiàn shì sīháobù zhòngyào 。
This matter is not important in the slightest.