human前要加a吗?

human前要加a吗? im a human a human bean! a human creature inches a human being a human kind可以加,A human human human human human Human Human life like a poem love is a human right human being是集合名词吗?那human beings呢 英语翻译可以这样吗“I waitting a human He in a farture”? human being有同义词吗? 请问human,humans,human being,human beings它们有什么区别以及他们可以通用吗? health is a basic human need