Chinese Adverbs are commonly placed in front of a verb. Some can precede the sentence-initial noun phrase, but some are fixed.
他有時會上班遲到 (tā yǒu shí huì hàng bān chí dào/ He is sometimes late for work)
有時他會上班遲到 (yǒu shí tā huì hàng bān chí dào/ He is sometimes late for work.)
Some adverbs can never occupy the position in front of the sentence-initial noun. For example, 都 (d¯ou/ all) as an adverb interacting with various pragmatic factors in the discourse cannot occur in the sentence-initial position. Other non-movable adverbs include 又 (y`ou/ again), 就 (ji`u/ then), 經常 (j¯ıngch´ang/ frequently), and 常常 (ch´angchang/ often).
Reference: Chinese: a linguistic introduction by Chao Fen Sun
