过去完成时的用法
表示在过去某一动作之前已经完成的动作,强调“过去的过去”之意。常与by、 before等介词或状语从句连用或用于有上下文暗示的句子。
(2016天津卷3) When walking down the street, I came across David, whom I hadn’t seen for ages.
表示意向的动词,如hope、wish、 expect、 think、 intend、mean、 suppose等,用过去完成时表示“原本……(事实上未能……)
We had expected that you would be able to win the match.
注意:过去完成时的固定句型: ●This/It/ That was the first/ second/ third time( that) 表示“这/那是(某人)第几次做某事”,that从句要用过去完成时。 This was the first time that they had ever met. ●在 hardly…when…和no sooner…than…两个句型中,主句均用过去完成时。 Hardly had we arrived when the match started. |
将来完成时的用法
将来完成时主要表示在将来某一时间以前已经完成的动作,通常与“by+将来时间”连用,如 by six o’clock、 by the weekend、 by the end of next month等。
We shall have finished the project by the end of this year.
考点四动词的语态:
被动语态的构成
英语中的及物动词一般都有主动语态和被动语态两种形式。被动语态由“助动词be+done(过去分词)”构成。助动词be随着主语的人称、数和句子的时态的不同而变化。
主动形式表被动意义
在need、want、require、deserve等动词和worth等形容词的后面,动名词主动形式表示被动意义,其含义相当于动词不定式的被动形式。
The house needs repairing/ to be repaired.
The movie is worth watching.
在某些“主语(人/物)+be+形容词+不定式”结构中不定式的主动形式表示被动意义。这些形容词有nice、easy、fit、hard、difficult、important、impossible、pleasant、interesting等。
The problem is difficult to work out.
3. be to rent/ blame/let主动形式表示被动意义。
Who is to blame for the mistake?
The house is to let.
不能用被动语态的特殊动词
系动词类(look、seem、feel、taste、sound、prove、appear等)\
The water feels cold.
表示主语特征的词(wash、write、sell、wear、lock等)常与not、hardly、well、easily、 badly、nicely等副词连用.
This kind of cloth washes easily.
The book sells well.