表示时间顺序

I will finish my homework, then I will watch TV.

First, you need to turn on the computer, then you can start working.

表示条件

If it rains tomorrow, then we will have to cancel the picnic.

If you don't study, then you won't pass the exam.

表示结果或后果

She studied hard, then she passed the exam with flying colors.

He stood, for a moment, staring defiantly back at her, then took to his heels.

表示顺承关系

We can go to the beach first, and then we can grab some lunch.

Take the first right, then the second left.

表示假设

If it's raining this afternoon, then we'll have to cancel the picnic.

这些例句涵盖了"then"在表示时间、顺序、条件、结果、顺承关系和假设等方面的用法，适合初中生学习和使用。通过这些例句，可以更好地理解和掌握"then"的用法，提高英语表达能力。