<Li> 我 (wǒ) 当 (dāng) 兵 (bīng) 了 (le). (我 當 兵 了 .) I have become a soldier . (Compared with the previous example with post-verbal le, wǒ dāng le bīng, this emphasizes his present status as a soldier, rather than the event of becoming .) </Li> <Li> 他 (tā) 看 (kàn) 三 (sān) 场 (chǎng) 球 (qiú) 赛 (sài) 了 (le). (他 看 三 場 球賽 了 .) He (has) watched three ballgames . (Compared with the previous examples with post-verbal le and guo, tā kàn le sān chǎng qiú sài and tā kàn guo sān chǎng qiú sài, this places the focus on the number three, and does not specify whether he is going to continue watching more games .) </Li> <P> The two uses of le may in fact be traced back to two entirely different words . The fact that they are now written the same way in Mandarin can cause ambiguity, particularly when the verb is not followed by an object . Consider the following sentence: </P> <Ul> <Li> 妈妈 (māma) 来 (lái) 了 (le)! (媽媽 來 了!) (Mom come LE .) </Li> </Ul>

What is the chinese character to mark the perfective aspect of a verbal event