Notes:
(polite)
How are you. = 您好 = nín hǎo.
How are you? = 您好吗?= nín hǎo mā?
(familiar)
How are you. = 你好 = ní hǎo.
How are you? = 你好吗?= ní hǎo mā?
or, you just say "Hi" , more simple.
(answer)
I am fine = 我很好 = wǒ hén hǎo
Good morning = 早上好 = zǎo shàng hǎo
Good afternoon = 下午好 = xià wú hǎo
Good evening = 晚上好 = wǎn shàng hǎo
Good night = 晚安 = wǎn ān
Around lunch or dinner time, Chinese people like to greet like this also:
Have you eaten? = 吃饭了吗?= chī fàn le mā?
I've eaten = 吃过了 = chī guò le.
Grammar notes:
1…when you mean" this is a question" ,you just need to add a " mā" at the end of your sentence.
2...when 2 words with 3rd tone are together, the first word should change its tone to 2nd tone. example: you= nǐ , but, how are you = ní hǎo.
3..."le" without tone, means it spell a light tone.just lighter than others.