无论是身处学校还是步入社会，大家都尝试过写作吧，借助写作也可以提高我们的语言组织能力。范文怎么写才能发挥它最大的作用呢？这里我整理了一些优秀的范文，希望对大家有所帮助，下面我们就来了解一下吧。
情态动词加完成时态的用法 情态动词加现在完成时的含义篇一
your hair wants cutting
the book is worth reading
the floor requires washing.
2．need既可以用need to be done 也可以使用need doing ，两种形式都表达被动的意义
the house needs painting= the house needs to be painted.
the watch needed repairing= the watch needed to be repaired.
情态动词加完成时态的用法 情态动词加现在完成时的含义篇二
1）．may/might （just） as well “不妨，最好”，与had better相近；
since the flight was cancelled， you might as well go by train.
既然航班已经取消了，你不妨乘火车吧。相当于you had better go by train.
2） ．cannot / can‘t…too …“越……越好，怎么也不过分”。注意这个句型的变体cannot…over…。如：
you cannot be too careful when you drive a car.驾车时候，越小心越好。
the final chapter covers organizational change and development. this subject cannot be over emphasized .
3） ．usedn‘t 或did’t use to 为used to （do） 的否定式。
4）．should 除了“应该”一层意思外，考研大纲还规定要掌握其“竟然”的意思。如：i didn‘t expect that he should have behaved like that. 我无法想象他竟然这样做。
情态动词加完成时态的用法 情态动词加现在完成时的含义篇三
1）must have+过去分词，表示对已发生情况的肯定推测，译为“（昨天）一定……”。如：
my pain apparent the moment i walked into the room， for the first man i met asked sympathetically：“ are you feeling all right？”
［a］ must be ［b］ had been ［c］ must have been ［d］ had to be
（答案为c）
2）can‘t / couldn’t have+过去分词，表示对已发生情况的否定推测，译为“（昨天）一定没……”。如：
mary my letter； otherwise she would have replied before now.
［a］ couldn‘t have received ［b］ ought to have received
［c］ has received ［d］ shouldn‘t have received
（答案为a）
3）may / might have +过去分词，表示对已发生的事情做不肯定、可能性很小的推测，或事实上根本没发生，译为“也许……”。如：
at florida power‘s crystal river plant， a potentially serious leakage of radioactive water may have been unknowingly caused by an electrician.
情态动词加完成时态的用法 情态动词加现在完成时的含义篇四
1） needn‘t have + 过去分词，表示做了不必做的事，相当于“didn’t need to do”，译为“其实没必要……”。如：
you needn‘t have come over yourself.
as it turned out to be a small house party， we so formally.
［a］ needn‘t dress up ［b］did not need have dressed up
［c］ did not need dress up ［d］ needn‘t have dressed up
（没有必要穿的那么正式，体现是说话者的建议，实际结果是否真的穿的很正式没有确定，答案为d）
2）should have +过去分词，表示应该做某事但实际上未做，译为“本应该……”should not + have过去分词表示本不应该做某事但实际上做了，译为“本不应该……”。如：
i regret having left the work unfinished； i should have planned everything ahead carefully.
我本来应该事先认真地把每件事情规划的很好，但实际上作者还是没有规划好，以至工作没有完成。
3） ought to have +过去分词，表示动作按理该发生了，但实际上未发生，译为“该……”，与should 的完成式含义类似。如：
the porter ought to have called the fire-brigade as soon as he saw the fire in the stock， which went up in smoke .
4）could have +过去分词，表示过去本来可以做但却未做，译为“完全可以……”。这点与ought/should/ have +过去分词用法相似。如：
what you said is right， but you could have phrased it more tactfully.
5） may/ might have +过去分词，表示过去可以做但实际未做，译为“（那样）也许会……”。如：
it might have been better to include more punchy statistics and photos of equipment in the introduction to further assist first-time office automation managers.
