me
1. (particle) must, had better, should - used before verbs to form a weak command. When used in passive sentences, the verb does not take a passive suffix, with the exception of the word taea.
(Te Kākano Textbook (Ed. 2): 15, 84;)
Synonyms: hōpurupuru, rawa, mātua
2. (particle) must be, a must, has to be, have to be - also used before nouns and adjectives.
                                                                                        Me kawhe. /                                                                                                                                     Coffee is a must.                                                                                                                                    
Me reka ngā kai. /                                                                                                                                     The food must be tasty.                                                                                                                                    
Me whā rawa? /                                                                                                                                     Does it have to be four?                                                                                                                                
3. (particle) how should it be done - when used before pēhea and followed by a clause of purpose.
Kātahi au ka whakaaro, me pēhea e kitea ai, e mau ai te tangata nāna i tāhae. / Then I wondered how I could discover and catch the person who stole it.
See also me pēhea?