tiānqì rè de shíhou, wǒ gèng xǐhuan hē bīng chá.

In this sentence, 的 links a descriptive phrase to 时候.

The pattern is:

[clause / description] + 的时候 = when ... / at the time when ...

So:

• 天气热的时候 = when the weather is hot
• literally: the time when the weather is hot

This is a very common structure in Mandarin. You can use it with many kinds of situations:

• 下雨的时候 = when it rains
• 我小的时候 = when I was young
• 有空的时候 = when one has free time

That is a very common question.

When an adjective is the main predicate of a sentence, Mandarin often uses 很:

• 天气很热 = The weather is hot

But here, 热 is inside the phrase 天气热的时候, which is acting like a descriptive clause before 时候. In that position, 很 is often omitted unless you specifically want to emphasize very hot.

So:

• 天气热的时候 = when the weather is hot
• 天气很热的时候 = when the weather is very hot / when the weather is really hot

Both are possible, but the version without 很 is very natural here.

The sentence follows a very common Chinese pattern:

[time/condition] + [subject] + [adverb] + [verb phrase]

So here:

• 天气热的时候 = time/condition
• 我 = subject
• 更 = adverb
• 喜欢喝冰茶 = verb phrase

So the structure is:

天气热的时候， 我更喜欢喝冰茶。
When the weather is hot, I prefer drinking iced tea more.

Chinese often puts time or background information near the beginning of the sentence.

更 means more, even more, or to a greater degree.

So 更喜欢 means:

• like more
• prefer more
• like even more

In this sentence, 更 shows that in hot weather, the speaker’s preference for iced tea becomes stronger.

Compare:

• 我喜欢喝冰茶。 = I like drinking iced tea.
• 天气热的时候，我更喜欢喝冰茶。 = When it’s hot, I like drinking iced tea even more.

So 更 adds a comparative feeling, even if the thing being compared is only understood from context.

Yes. 喜欢 can be followed directly by a verb or verb phrase.

Pattern:

喜欢 + verb phrase = like doing something

So:

• 喜欢喝冰茶 = like drinking iced tea
• 喜欢看电影 = like watching movies
• 喜欢学习中文 = like studying Chinese

You can also like a noun directly:

• 喜欢冰茶 = like iced tea

The sentence uses 喜欢喝冰茶 because it focuses on the action of drinking it.

Because 喝 is the verb used for drinking liquids.

Since 冰茶 is a drink, 喝 is the natural verb:

• 喝茶 = drink tea
• 喝水 = drink water
• 喝咖啡 = drink coffee

So 喜欢喝冰茶 means like to drink iced tea.

Usually, yes, learners will understand 冰茶 as iced tea.

However, in real-life usage, the most natural wording can depend on region and context. For example, people may also say more specific things like:

• 冰红茶 = iced black tea / a bottled iced tea drink
• 冰绿茶 = iced green tea
• 冰的茶 = tea that is cold / iced tea in a more literal sense

So 冰茶 is understandable and works well for learning, but in everyday speech, speakers may choose a more specific expression depending on what kind of tea they mean.

Yes. 天热的时候 is a very common shorter version.

Compare:

• 天气热的时候 = when the weather is hot
• 天热的时候 = when it is hot / when the weather is hot

Both are natural.
天气热的时候 is a little fuller and more explicit.
天热的时候 is shorter and very common in conversation.

Yes, but the style changes.

• 天气热的时候 = natural, common in speech and writing
• 天气热时 = shorter, more concise, slightly more written/formal

So both are correct, but 的时候 is usually better for learners and for everyday conversation.

Chinese often puts time, condition, or background information before the main statement.

So instead of starting with 我, it is very natural to start with:

• 天气热的时候 = when the weather is hot

Then the speaker gives the main point:

• 我更喜欢喝冰茶

This kind of ordering helps set the scene first. English can do this too:

• When the weather is hot, I prefer drinking iced tea.

So the Chinese sentence structure is very normal.

Sometimes yes, if the subject is already clear from context.

For example, in conversation, someone might simply say:

• 天气热的时候，更喜欢喝冰茶。

This can sound natural if everyone already knows who is being talked about.

But in a standalone sentence, 我 makes it clear and complete:

• 天气热的时候，我更喜欢喝冰茶。

So including 我 is the safest and most natural choice for learners.

It normally sounds like a general preference or habit.

天气热的时候 often means whenever the weather is hot or in hot weather, not just one specific time.

So the sentence usually means something like:

• In hot weather, I prefer iced tea.
• When it’s hot, I like drinking iced tea more.

If you wanted to make it clearly about one particular past occasion, you would usually add more context.