"if" 的定义和意义

如果

used to say that something happening, existing, etc. depends on another thing happening, existing, etc.

如果

used to express one's opinion

‌an uncertain possibility or condition

例子

We can go to the park if the weather is nice.

I will go to the party if I finish my homework on time.

We can go for a walk if you want to.

If he doesn't catch the bus, he will be late for school.

I will lend you my umbrella if it starts raining.

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