“请看这三本书的价钱,我们可以说:$50This book is expensive.$100This book is more expensive.$500This book is the most expensive.仔细观察我们可以看出:expensive的比较级和最高级的变化方法是在单词前加more和the most,与以前学过的变化方法不同。请继续看图,说一说boring,inter-est ing等词如 ”Look at the price of these three books, we can say: $ 50This book is expensive. $ 100This book is the most expensive. $ 500This book is the most expensive. Careful observation we can see: expensive comparison and the highest level The method of variation is to add more and the most to the word, different from the method of change learned before. Please continue to read the figure and say something like boring and inter-est ing