wǒ xīwàng chī le yào yǐhòu, míngtiān zǎoshang jiù néng tuìshāo.

Yes, 吃 literally means eat, but in Chinese 吃药 is the normal everyday way to say take medicine.

A few useful comparisons:

• 吃药 = take medicine, especially pills/tablets
• 喝药 = drink medicine, especially liquid medicine or herbal medicine

So although the literal wording may sound strange in English, 吃药 is completely natural in Mandarin.

Here, 了 marks the action as completed: after having taken the medicine.

So:

• 吃药以后 = after taking medicine / after taking medicine in general
• 吃了药以后 = after having taken the medicine, with clearer emphasis that the action is completed first

This 了 is not simply a past-tense marker like English -ed. It is an aspect marker, showing completion of the action.

以后 means after.

In Chinese, a very common pattern is:

verb phrase + 以后 = after doing ...

So:

• 吃了药以后 = after taking the medicine
• literally: having taken medicine + after

This whole part acts like a time-setting phrase for the rest of the sentence.

It is not a full independent sentence here, but it is a complete time phrase or subordinate clause meaning after taking the medicine.

It sets up the condition or time frame for the main idea:

• 吃了药以后 = after taking the medicine
• 明天早上就能退烧 = by tomorrow morning, then be able to reduce the fever

So the sentence structure is basically:

I hope [after taking medicine], [by tomorrow morning I’ll already be able to get rid of the fever].

Because Chinese often leaves out repeated subjects when they are already clear from context.

In this sentence, the subject at the beginning is 我, and it is understood to continue through the rest of the sentence:

• 我希望
• (我) 吃了药以后
• (我) 明天早上就能退烧

In English, we often repeat pronouns more. In Chinese, once the subject is obvious, it is often omitted.

就 is one of those words that often adds a subtle meaning rather than a single fixed translation.

Here, 就 suggests something like:

• then
• already
• as early as
• sooner than expected

So 明天早上就能退烧 gives the feeling of:

• be able to break the fever by tomorrow morning already
• hopefully as early as tomorrow morning, the fever will be gone

Without 就, the sentence would still make sense, but it would lose that nuance of earliness or quick result.

能 here means be able to or it will be possible to.

So 就能退烧 means something like then I’ll be able to get rid of the fever.

Comparison:

• 能 = ability or possibility under the circumstances
• 会 = will / likely to, often more about prediction
• 可以 = can / may, often about permission or general possibility

In this sentence, 能 sounds natural because the idea is that after taking medicine, it may become possible for the fever to go down.

You could hear 会 in some similar sentences, but 能 works well here because it connects the medicine with the hoped-for result.

退烧 means for a fever to go down or to break a fever.

• 退 = go down, recede
• 烧 = fever

So 退烧 is a set expression meaning the fever goes down.

In English, we usually say:

• my fever goes down
• the fever breaks
• I stop having a fever

In Chinese, it is very natural to say a person 退烧, even though literally it is the fever that goes down.

Chinese time expressions usually come before the main verb phrase.

So:

• 明天早上 = tomorrow morning
• 就能退烧 = then will already be able to break the fever

This is very typical Chinese word order:

subject + time + adverb + modal + verb

Here the structure is:

• 我希望
• 吃了药以后
• 明天早上
• 就能退烧

That ordering sounds natural in Mandarin.

That version is grammatical, but it changes the meaning.

• 吃了药以后，明天早上就能退烧 = after taking the medicine, by tomorrow morning the fever will be down
• 明天早上吃了药以后就能退烧 = after taking the medicine tomorrow morning, then be able to reduce the fever

The second version suggests the medicine is taken tomorrow morning, which is probably not what this sentence means.

So the original order helps show that:

1. the medicine is taken first
2. by tomorrow morning, the fever is hoped to be gone

Yes, you can say 吃药以后, and it is still understandable.

But there is a nuance:

• 吃药以后 = after taking medicine, more general
• 吃了药以后 = after having taken the medicine, more clearly completed

With 了, the sentence more strongly marks that the medicine-taking happens first and is completed before the hoped-for result.

Yes. 希望 can be followed directly by the thing someone hopes for, including a full clause.

So:

• 我希望... = I hope...
• 我希望吃了药以后，明天早上就能退烧。 = I hope that after taking the medicine, I’ll be able to break the fever by tomorrow morning.

This is very normal Chinese.

You do not need an extra word like English that, although English translation often uses it.

The comma separates the opening time/condition phrase from the main clause:

• 吃了药以后， = after taking the medicine,
• 明天早上就能退烧。 = by tomorrow morning, I’ll already be able to break the fever.

In writing, this comma helps readability. In speech, there is usually a slight pause there.

It is not the same kind of strict punctuation rule as in English, but it is very natural to write it this way.

Because in everyday Mandarin, the 上 in 早上 is often pronounced with a neutral tone.

So:

• dictionary-style full tone: zǎoshàng
• common spoken form: zǎoshang

Both help learners recognize the word, but the neutral-tone pronunciation is very common in real speech.