You use maybe to express uncertainty, for example when you do not know that something is definitely true, or when you are mentioning something that may possibly happen in the future in the way you describe.
perhaps
Maybe she is in love.
也许她是恋爱了。
I do think about having children, maybe when I'm 40.
我确实考虑要孩子,也许在我40岁时。
You use maybe when you are making suggestions or giving advice. Maybe is also used to introduce polite requests.
perhaps
Maybe we can go to the cinema or something.
也许我们可以去看电影什么的。
Maybe you'd better tell me what this is all about.
也许你该告诉我,这到底是怎么一回事。
You use maybe to indicate that, although a comment is partly true, there is also another point of view that should be considered.
perhaps
Maybe there is jealousy, but I think the envy is more powerful.
可能是有嫉妒,但我想更强烈的是羡慕。
You can say maybe as a response to a question or remark, when you do not want to agree or disagree.
'Is she coming back?'—'Maybe. No one hears from her.'
“她快回来了吗?” “可能吧,没有人知道她的消息。”
You use maybe when you are making a rough guess at a number, quantity, or value, rather than stating it exactly.
The men were maybe a hundred feet away and coming closer.
那些人大约有一百英尺远,正在向这里靠近。
People use maybe to mean 'sometimes', particularly in a series of general statements about what someone does, or about something that regularly happens.
They'll come to the bar for a year, or maybe even two, then they'll find another favourite spot.
他们将会来这个酒吧待上一年,或者有时甚至两年,然后他们会再找另外一个喜欢的地方。