Ma (嗎) is a question particle that is used to turn statements into yes-no questions. By adding ma (嗎) to the end of a declarative sentence, a yes-no question (also known as binary question or polar question) is formed:
你會中文 (Nǐ huì Zhōngwén/ You speak Chinese.)
→ 你會中文嗎? (Nǐ huì Zhōngwén ma?/ Do you speak Chinese?)
我該去 (w˘o g¯ai q`u/ I should go.)
→ 我該去嗎? (w˘o g¯ai q`u ma/ Should I go?)
