Perfectivity
动词的完成式
🗣️ 情景例句
Does this come with a certificate of authenticity?
这有鉴定证明吗？
Marry your son when you will, your daughter when you .
给儿子娶亲，想在什么时候皆可；把女儿嫁人要在有力量时才行。
It has been found that certain bats emit squeaks and by receiving the echoes,
人们发现，某些蝙蝠能发出尖叫声，