1. be worth doing sth. 值得做What is worth mentioning is its excellent design with various colors.值得一提的是它的和各种配色在一起的完美设计。2. be+adj.+of sb. to do 某人做怎样It is immoral of you to mock other peoples defects.你嘲笑别人的缺陷是很不道德的。3. There is no better way to do than to do 做最好办法就是There is no better way to get higher scores than to study harder.想要取得好成绩的最好方法就是更刻苦地学习。4. Only. 在句首用倒装（部分倒装）Only when you practice and speak more can you have a better command of oral English.只有当你训练得更多说
