英语条件句有时被称为“if 从句”，分为真实条件句和非真实条件句，它们描述了可能发生（现在或将来）或可能发生但没有发生（过去）的事情的结果，由不同的时态组成，主要有四种条件句：零条件句、第一类条件句、第二类条件句和第三类条件句。
Hello, everyone and welcome back to English with Lucy today.
Very exciting, I have a grammar lesson for you.
We are going to discuss the four conditionals.
This is a very, very important lesson.
I know that this is a topic, that lots of my students struggle with.
There's so much to remember, but hopefully I can clarify, lots of your doubts today.
Right, let's get started with the grammar lesson.
So we're going to talk about the four conditionals.
We have the zero conditional, the first conditional, the second conditional, and can you guess what the last conditional is?
Congratulations, it's the third conditional.
