就 is used in both contemplated and completed actions, expressing a plan, request, command, statement or condition.
a. Indicates the immediacy of the next action.
S1 V1 了 O1, (S2) 就 V2 O2 (了/吧)
我 下 了 课, 就 回 家 了。
As soon as I got out of class, I went home.
Wǒ xià le kè, jiù huí jiā le.
b. Indicates an action takes or took place sooner or earlier than expected.
S Time-expression 就 VO ( 了)
我 今天五点钟 就 起来了。
Today I got up at five o’clock.
Wǒ jīntiān wǔ diǎn zhōng jiù qǐláile.
c. Means ” (if) …… then”
(要是) S1 V1 O1 , (S2) 就 V2O2
要是 我 有 时间, 我 就 参加。
(If) I have time,then I will attend.
Yàoshi wǒ yǒu shíjiān, wǒ jiù cānjiā.
d. Means “… will … => … 就(会, 要) + verb …
rúguǒ míngtiān xiàyǔ, yīnyuèhuì jiù huì qǔxiāo.
如果明天下雨, 音乐会就会取消.
If it rains tomorrow, the concert will be cancelled.
e.The structure “就+verb”indicates a conclusion or a resolution made on the basis of what’s been mentioned previously. For example:
If you don’t want to go, just rest at home.
⑴ 你不想去,就在家休息吧。
Nǐ bùxiǎng qù, jiù zàijiā xiūxí ba.
The coffee here is good. Let’s drink coffee.
⑵ 这儿的咖啡不错,就喝咖啡吧。
Zhè’er de kāfēi bùcuò, jiù hē kāfēi ba.
Today is Dad’s birthday. Let’s go out for dinner.
⑶ 今天是爸爸的生日,我们就去外面吃饭吧。
Jīntiān shì bàba de shēngrì, wǒmen jiù qù wàimiàn chīfàn ba.
Welcome to have my 1-ON-1 lessons on http://www.verbling.com/teachers/dawei 🙂