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Chinese grammar - The completion complement 完 (wán) - to finish an action

The completion complement 完 (wán) - to finish an action

We previously saw (wán) used to form compound verbs that had a sense of successful completion.

It can be used more generically as 'completion complement' to express the full completion of an action or task.

So rather than 'I ate dinner', we have 'I finished eating dinner'.

inherently conveys the idea that an action has fully concluded and as such is always used in the past tense with the Completed Action Marker (le) or the negating past tense marker 没有 (méiyǒu).

Used in this way allows appears immediately after the root verb.

Examples:
我吃完了晚饭。
wǒ chī wán le wǎnfàn.
I ate (finished eating) dinner.
我没有吃完晚饭。
wǒ méiyǒu chī wán wǎnfàn.
I didn't finish eating dinner.
她看完了那部电影。
tā kàn wán le nà bù diànyǐng.
She watched (finished watching) that movie.
我读完了这本书。
wǒ dú wán le zhè běn shū.
I read (finished reading) this book.
你做完了作业吗?
nǐ zuò wán le zuòyè ma?
Did you do (finish) your homework?
你吃完了饭吗?
nǐ chī wán le fàn ma?
Did you finish eating?
我没吃完晚饭。
wǒ méi chī wán wǎnfàn.
I did not finish eating dinner.
因为很辣所以我没吃完。
yīnwèi hěn là suóyǐ wǒ méi chī wán.
Because (it was) spicy I did not finish eating.
你喝完了那杯茶吗?
nǐ hē wán le nà bēi chá ma?
Have you finished drinking that cup of tea?
因为茶很烫所以我没喝完。
yīnwèi chá hěn tàng suóyǐ wǒ méi hē wán.
Because the tea is hot, so I didn't finish.

(tàng) means 'hot'

他修完车了吗?
tā xiū wán chē le ma?
Did he finish repairing the car?

(xiū) means 'to repair' or 'to fix'

你为什么没有吃完蛋糕?
nǐ wèishénme méi yǒu chī wán dàngāo.
Why didn't you finish the cake?