may 是情态动词,"可以可能",may +动词原形
You may well say so
Maybe you'll have better luck next time
may be,may是情态动词,be是动词原形,“也许是、可能是”.
She may be a nurse.
may be和maybe它们的含义和用法不同.
may be中,may是情态动词,be是动词原形,两者构成完整的谓语形式,与主语形成系表结构,意为“也许是、可能是”.
He may be a teacher.他可能是个老师
maybe是副词,意思是“也许、可能”,在句中作状语,相当于perhaps,常位于句首.
Maybe he will go to the hospital.也许他会去医院.
maybe和may be可相互转换.
You may be right.
= Maybe you are right.你或许是对的.
may情态动词,用于肯定句,表示许可,目的以及可能性,也用于疑问句,表示请求,询问,怀疑,犹豫等.在疑问句中,常用can ,could ,might来代替may,其中could与might比may更有（更加）怀疑,犹豫,不确定.
肯定句中,may表示许可时,更庄重,郑重一点.
而may be则是情态动词may与系动词be的组合,这也是may的一个用法,may后边接动词的时,要用原形,当然这也是情态动词的一般性质.
maybe是副词,“也许,可能”,“大概”,用法很简单,常用于句子开头,有时后边紧接着加一逗号,与后面的句子分开.表示一种可能性?可能发生某事（可能是这样）,或可能不发生某事（可能不是某种情况）.
例句：
1.You may come in now .(许可)
2.I give her some money so that she may buy some books .（目的）
3.May I go now （询问）
4.He has been ill for 3 days .He may be fine now .
5.He has been ill for 3 days .Maybe ,he is fine now .
6.Maybe he will come ,maybe he won’t .
7.Is it true
Maybe ,I am not sure .
