“如果”是人类在思考能、可能或原本可能发生的事情时最常想到的词语之一。在英语中，我们会使用引导条件句的单词“if”来表达这类想法。你会使用“混合条件句”、“真实条件句”吗？来测试自己对英语语法难点之一 — 条件句的掌握。 b) three (‘first ...

Conditionals are used to express both real, likely and unreal situations. As a result, tenses used with them are not flat; they change. That is why the difference between ‘If I arrive’ and ‘If I had ...