tā xiān yùyuē le yīshēng, ránhòu qǐngjià qù yīyuàn.

she

Breakdown of tā xiān yùyuē le yīshēng, ránhòu qǐngjià qù yīyuàn.

• 去qù: to go
• 了le: perfective particle

Questions & Answers about tā xiān yùyuē le yīshēng, ránhòu qǐngjià qù yīyuàn.

Why are 先 and 然后 used here?

They show the order of actions.

• 先 = first
• 然后 = then / after that

So the sentence is structured as:

• 她先预约了医生
• 然后请假去医院

This is a very common way to describe a sequence in Mandarin.

A useful pattern is:

先 + action 1， 然后 + action 2

For example:

• 我先吃饭，然后学习。
  First I eat, then I study.

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What does 了 mean in 预约了?

Here, 了 marks the action as completed or viewed as a finished event.

So 预约了医生 means she made the appointment (that action has been done).

In this sentence, 了 helps show that the first action happened before the later action.

Compare:

• 她预约医生。
  She makes / is making an appointment with a doctor.
  (more general, less clearly completed)

• 她预约了医生。
  She made an appointment with a doctor / the doctor.
  (completed event)

This 了 is often called the perfective 了.

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Why is there no 了 after 请假 too?