Formal:
* 我会说中文。 (Wǒ huì shuō zhōngwén.) - This is the most common and direct way to say it.
* 我精通中文。 (Wǒ jīngtóng zhōngwén.) - This means "I am fluent in Chinese." It implies a higher level of proficiency.
Informal:
* 我会说一点中文。 (Wǒ huì shuō yīdiǎn zhōngwén.) - This means "I can speak a little Chinese."
* 我懂一点中文。 (Wǒ dǒng yīdiǎn zhōngwén.) - This means "I understand a little Chinese."
To ask someone if they can speak Chinese, you can say:
* 你会说中文吗? (Nǐ huì shuō zhōngwén ma?) - This is the most common way to ask.
* 你会讲中文吗? (Nǐ huì jiǎng zhōngwén ma?) - This is a slightly more colloquial way to ask.
The best way to say it depends on the situation. For example, if you are talking to a teacher or a stranger, you would use the formal form. If you are talking to a friend, you could use the informal form.