yàoshi nǐ shēngbìng le, jiù zài jiā xiūxi ba.

If you get sick, then rest at home.

Breakdown of yàoshi nǐ shēngbìng le, jiù zài jiā xiūxi ba.

• 你nǐ: you
• 家jiā: home
• 在zài: at
• 了le: change-of-state particle

Questions & Answers about yàoshi nǐ shēngbìng le, jiù zài jiā xiūxi ba.

What does 要是 mean here? Is it the same as 如果?

要是 introduces a condition, like if in English.

So 要是你生病了 means if you get sick / if you are sick.

It is very similar to 如果. In many everyday sentences, they can be exchanged:

• 要是你生病了，就在家休息吧。
• 如果你生病了，就在家休息吧。

The main difference is tone:

• 如果 is a little more neutral and common in both spoken and written Chinese.
• 要是 often sounds a bit more conversational.

In this sentence, 要是 is perfectly natural.

Why is there a 了 after 生病?

Here, 了 does not simply mean past tense.

In 生病了, the 了 shows a new situation or change of state: you have become sick or are now sick.

That is why this part often feels like:

• if you get sick
• if you end up sick
• if you’re sick now

Compare:

• 你生病。 → sounds incomplete or unnatural by itself in most situations
• 你生病了。 → you got sick / you are sick now

So in this sentence, 了 helps mark the condition as a real state that has happened or come about.

What is 就 doing in the sentence?