坏 (huai)
You can say "我说中文不好" (wǒ shuō zhōngwén bù hǎo) which means "I am bad at speaking Chinese".
Ni hen huai
Bu hao. 不好.
you have a lot of homework and a bad headache
很糟 [hěn zāo]
极坏 [jí huà i]
yeah it did thanks. on oops i deleted it my bad
Although this is a bad question to ask: [See links below for more]
migraine headache
bad headache and if it is really bad you may vomit
Splitting. I have a splitting headache.