The adverb 多半 "probably"
The adverb 多半 
emphasizes that something is likely to happen. In a sentence, it is placed before a predicate.
emphasizes that something is likely to happen. In a sentence, it is placed before a predicate.Examples
他今天多半不会来了
He probably won't come today
tā jīntiān duōbàn bú huì lái le
他没来，多半是生气了
He didn't come. He's probably angry
tā méi lái, duōbàn shì shēngqì le
星期天她多半在家做清洁
She'll probably be cleaning the house on Sunday
xīngqítiān tā duōbàn zài jiā zuò qīngjié
她明天多半会赢
She'll probably win tomorrow
tā míngtiān duōbàn huì yíng