SKKN Some experience teaching effective conditional sentences for students at Tho Xuan 5 High School in the National High School Examination CATEGORY 1 introduction 1 1 1 Reason for choosing the topic 1 1 2 Reseach purposes 1 1 3 Research subjects 1 1 4 Research methods 1 1 5 New points 1 2 Content 2 2 1 Theoretic basis of the topic 2 2 2 The reality of the topic 2 2 3 Problem sloving 2 2 3 1 Definition 2 2 3 2 Types of conditional sentences 3 2 3 2 1 Conditional sentences in the text book 3 2 3[.]