Lý thuyết và hướng dẫn sử dụng Giả Định Thức

I'd be happy to help you with the Conditional Tenses in English grammar. **Conditional Tenses (Giả Định Thức)** Conditional Tenses are used to talk about hypothetical or uncertain situations and their consequences. There are four main types of Conditional Tenses: 1. **Zero Conditional (Giả Định Thức Zero)**: used to talk about universal truths or scientific facts. Example: If you heat ice, it melts. 2. **First Conditional (Giả Định Thức Đầu Tiên)**: used to talk about future possibilities or predictions. Example: If it rains, I will take an umbrella. 3. **Second Conditional (Giả Định Thức Thứ Hai)**: used to talk about hypothetical or unlikely situations and their consequences. Example: If I won the lottery, I would buy a house. 4. **Third Conditional (Giả Định Thức Thứ Ba)**: used to talk about past hypothetical situations and their consequences. Example: If I had studied harder, I would have passed the exam. **How to use Conditional Tenses** * Use the correct verb forms: base form, present simple, past simple, past perfect, etc. * Pay attention to the time and context of the sentence. * Use the correct conjunctions: if, unless, as long as, etc. **Common mistakes to avoid** * Mixing up the verb forms or tenses. * Using the wrong conjunctions. * Not using the correct sentence structure. **Practice exercises** 1. Complete the sentences with the correct verb forms: * If I __________ (win) the lottery, I would buy a house. * If it __________ (rain), we would go to the beach. 2. Choose the correct sentence: * If I would have studied harder, I would have passed the exam. * If I had studied harder, I would have passed the exam. I hope this helps you understand and use Conditional Tenses correctly!