Express duration

Question 1

How long have you studied Chinese?

Answer 1

S + V + 了 + Duration + O + 了 （indicates the duration of an action which is still going on.）

你学习了多长时间中文了？
Nǐ xuéxíle duō cháng shíjiān zhōngwénle?

Question 2

She has worked for three years.

Answer 2

S + V + 了 + Duration + O （indicates the duration of an action）

她工作了三年。
Tā gōngzuòle sān nián.

Question 3

How long do you study Chinese every day?

Answer 3

S + V + Duration + O (Ongoing)

你每天学习多长时间中文？
Nǐ měitiān xuéxí duō cháng shíjiān zhōngwén?

Question 4

I take classes three times a week.

Answer 4

每个星期我上三次课。

Měi gè xīngqí wǒ shàng sāncì kè

Question 5

When his friends were here, they watched movies three times a week.

Answer 5

他的朋友在这儿的时候, 他们一个星期看三次电影。

Tā de péngyǒu zài zhè’er de shíhòu, tāmen yīgè xīngqí kàn sāncì diànyǐng.

Question 6

I just came to China for a month.

Answer 6

刚 - must use a duration, expresses a short amount of time from the point of view of the speaker.

我刚来中国一个月。
Wǒ gāng lái zhōngguó yīgè yuè.

Question 7

I just had a cup of coffee.

Answer 7

刚 - must use a duration, expresses a short amount of time from the point of view of the speaker.

我刚才喝了一杯咖啡。
Wǒ gāngcái hēle yībēi kāfēi.