Most time-position adverbials, especially those realized by NPs, readily take the sentence-initial position, assuming the function of a sentential adverbial. They provide a temporal frame within which the event described by the sentence occurs. This is shown by (1e, f). In (1f), the time adverbial ‘jìn le fángjiān yǐhòu’ (after entering the room) occurs initially, designating a temporal frame within which the event of starting to write the report takes place. The point in time denoted by the adverb ‘lìkè’ in the sense of ‘immediately, or at the moment’, signifies a temporal state, which starts almost at the same time with the event of writing the report. This explains its preverbal position.
Tā yuánlái shì gè lǎoshī.
(He originally was a teacher.)
Tā zuìjìn yùdào le yīxiē máfan.
(Recently he was in trouble.)
Xiǎowáng bìyè yǐqián jiù qù gōngzuò le .
(Xiao Wang had begun working before he graduated.)
Liú lǎoshī yǐqián céng zài Shànghǎi zhù guò yī duàn shíjiān.
(Teacher Liu once lived in Shanghai for some time.)
Wǔfàn hòu nǐ néng dào wǒ de bàngōngshì lái yīxià ma?
(After lunch will you please come to my office?)
Jìn le fángjiān yǐhòu tā lìkè dòngshǒu xiě bàogào.
(After entering the room, he immediately started to write a report.)
 Loar, J. K. (2011). Chinese syntactic grammar: functional and conceptual principles. New York: Peter Lang.