摘要：
十八、be+forced/compelled/obliged+to+V（不得不...）例句:Sincetheexaminationisaroundthecorner,Iamcomp... 十八、be +
forced/compelled/obliged + 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.
十九、It is conceivable that + 句子 （可想而知的）
It is obvious that + 句子 （明显的）
It is apparent that + 句子 （显然的）
例句:It is conceivable that knowledge plays an important role in our life.
可想而知,知识在我们的一生中扮演一个重要的角色.
二十、That is the reason why ~~~ （那就是...的原因）
例句:Summer is sultry. That is the reason why I don't like it.
夏天很燠热.那就是我不喜欢它的原因.
二十一、For the past + 时间,S + 现在完成式...（过去...年来,...一直...）
例句:For the past two years, I have been busy preparing for the examination.
过去两年来,我一直忙着准备考试.
二十二、Since + S + 过去式,S + 现在完成式.
