* Khi ta dùng câu điều kiện khi bắt buộc dùng hai câu như: câu điều kiện và mệnh đề chính ; vì vậy ta có có thể đảo câu mệnh đề chính lên trước được không? vì sao?

In English conditional sentences, it is possible to invert the order of the clauses, putting the main clause before the condition clause. However, this is not always the case. When the condition clause starts with "if", we can invert the order, but we need to use the inverted form of the verb in the condition clause, and we also need to use a comma to separate the two clauses. For example: * If I won the lottery, I would buy a house. * I would buy a house if I won the lottery. However, when the condition clause starts with "unless", "until", or "provided that", we cannot invert the order of the clauses. For example: * I will not go unless you come with me. (cannot be inverted) * Unless you come with me, I will not go.