你好吗 (Nǐ hǎo ma) implies "how are you?"
好 (Hǎo) implies good
不 (Bù) implies not
我 (Wǒ) implies I
很 (Hěn) implies very
我很好 (Wǒ hěn hǎo) implies "I am very good"
你 (Nǐ) implies you