If you throw a ball in the air, it falls back down. If you pour water onto a fire, it gets put out. These are sentences that are called "conditional sentences." These particular sentences are "zero conditionals." Let's look at another type of conditional sentence: first conditionals.
First conditionals are used to explain about conditions that have a real possibility of happening in the future. It's not 100 percent sure, but there is a big chance that it will happen. Let's look at an example. "If I study hard, I'll pass the test." Is there a chance for me to pass the test if I study hard? Yes. Can this happen? Yes. Does it mean my passing is 100 percent guaranteed? No. But the test is a very likely thing that can happen. And that is a first conditional sentence. It has the structure of "If + present tense clause, will + present tense clause."
第一類條件句被用來說明一些情況，未來很可能發生的狀況。那並非百分之百肯定，但有很大的可能性會發生。來看一個例子。「如果我用功讀書，我就會通過考試。」如果我用功讀書，我是否就有通過考試的機會呢？是的。這可能發生嗎？可能。這代表我百分之百保證會通過嗎？不是。不過考試是件很可能發生的事。那就是一句第一類條件句。它包含「If(如果) + 現在式子句，will(將會) + 現在式子句」的句構。
Now, for another example. So, you just woke up, and looking outside the window, you see gray clouds. You say to yourself, "If it rains, I'll go back to sleep." Or you can also say, "I will go back to sleep if it rains." Is this situation possible? Yes. Will this situation happen 100 percent? No.
So, that's pretty much what a first conditional is. It's to talk about things that have a high chance of happening. Now, you try and make a first conditional sentence in the comments section below, and we'll see if you're correct.