The adverb 没准儿 "maybe"
We can use the adverb 没准儿 
to make a guess or to make an assumption.
to make a guess or to make an assumption.
Pay attention
In a sentence, 没准儿 serves as an attribute.
Examples
如果当年他跟她结了婚，没准儿现在早就离婚了
If he had married her at that time, they would have already gotten divorced
rúguǒ dāngnián tā gēn tā jié le hūn, méizhǔnr xiànzài zǎo jiù líhūn le
没准儿人们会被强制要求办理健身房会员卡
People may be forced to buy gym memberships
méizhǔnr rénmen huì bèi qiángzhì yāoqiú bànlǐ jiànshēnfáng huìyuánkǎ
你要是考试前认真复习，没准儿就考上大学了
If you study hard before exams, you can probably get into college
nǐ yàoshi kǎoshì qián rènzhēn fùxí, méizhǔnr jiù kǎoshàng dàxué le
没准儿 can also be used independently to answer a question.
Examples
——他不会忘了今天有课吧？
He hasn't forgotten that he has a lesson today, has he?
tā bú huì wàng le jīntiān yǒu kè ba
——没准儿
Maybe
méizhǔnr