早上好，学习中文的朋友。 Good morning, Chinese learner friend.
Today we are going to talk about 就。
When someone is urging you to hurry up, you may say ,”我就来。”
我就来。 I will come right away. Here 就 means ‘at once, right away’
Here is a scenario. My friend and I have a date next morning at 8:20am. The next morning, at 8:00am, I arrive at the place where we are supposed to meet. I wait and wait. She shows up at 8:30am. I am a bit mad. I say,”八点我就来了。” Here, to emphasize that I am earlier than she expects. I use 就. Then I complain that she is later than I expect. I say, “八点半你才来。” 才 emphasizes something happens much later than one’s expectation.
bā diǎn wǒ jiù lái le
I’ve already been here at 8:00.
bā diǎn bàn nǐ cái lai
You showed up until 8:30.