+ forced / obliged / compelled + to + V：不得不……

例句：

Since the examination is around the corner, I am compelled to give up doing sports. 
既然考试迫在眉睫，我不得不放弃做运动。

2.a. + as + S + be, S + V + O：虽然……， 但是……

例句：

Rich as our country is, the quality of our life is by no means satisfactory. 
虽然我们的国家富有，但我们的生活质量仍差强人意。

3.It is conceivable / obvious / apparent that + 句子：可想而知/明显/显然……

例句：

It is apparent that knowledge plays an important role in our life.
显然，知识在我们人生中扮演着重要角色。

4.The + 形容词比较级 + S + V, the + 形容词比较级 + S + V：……愈……，……愈……

例句：

The harder you work, the more progress you make.
愈努力，愈进步。

5.Since + S + 动词过去式，S + 现在完成式： 自从……，……一直……

例句：

Since he went to senior high school, he has worked very hard.
自从上了高中，他一直很用功。