一、The reason why + ~~~ is that + 句子 (...的原因是...)
例句：The reason why we have to growtrees is that they can provide us with fresh air./ The reason why we have togrow trees is that they can supply fresh air for us.
我们必须种树的原因是它们能供应我们新鲜的空气。
二、So + 形容词+ be + 主词 + that + 句子 (如此...以致于...)
例句：So precious is time that wecant afford to waste it.
时间是如此珍贵，我们经不起浪费它。
三、Adj + as + Subject(主词)+ be, S + V~~~ (虽然...)
例句：Rich as our country is, thequalities of our living are by no means satisfactory. {by no means = in no way= on no account 一点也不}
虽然我们的国家富有，我们的生活品质绝对令人不满意。
四、The + ~er + S + V,
~~~the + ~er + S + V ~~~
The + more + Adj + S + V,
~~~the + more + Adj + S + V~~~(愈...愈...)
例句：The harder you work, the moreprogress you make.
你愈努力，你愈进步。
The more books we read, themore learned we become.
我们书读愈多，我们愈有学问。
五、By +Ving, ~~ can ~~ (借着...，..能够..)
例句：By taking exercise, we canalways stay healthy.
借着做运动，我们能够始终保持健康。
六、~~~ enable + Object(受词)+ to + V (..使..能够..)
例句：Listening to music enable us tofeel relaxed.
听音乐使我们能够感觉轻松。
七、On no account can we + V ~~~ (我们绝对不能...)
例句：On no account can we ignore thevalue of knowledge.
我们绝对不能忽略知识的价值。
八、It is time + S + 过去式 (该是...的时候了)
例句：It is time the authoritiesconcerned took proper steps to solve the traffic problems.
该是有关当局采取适当的措施来解决交通问题的时候了。