当某些动词后的宾语从句之后有宾语补足语(通常是形容词或名词)时,通常以it代替that宾语从句作形式宾语,这时that不可省略。常见的这类动词有find, think,consider, take, feel等。
I think it necessary that we take plenty of hot water every day.
我认为我们每天多喝开水是有必要的。
We find it difficult that we should finish the work on time.
我们发现我们按时完成工作有困难。
[名师点津] 在like, enjoy, love, hate 等表"喜怒哀乐"的动词或一些特殊动词(短语)如take, depend on, rely on, see to等后若要跟宾语从句,需先跟形式宾语 it,再接宾语从句。
I hate it when they say with their mouths full of food.
我讨厌他们满嘴食物时说话。
You may depend on it that they will support you.
你相信好了,他们会支持你的。
(2)宾语从句的否定转移
当主句的主语是第一人称,谓语动词是think, believe, suppose, imagine, expect等表示"认为、相信、猜测"等意义的动词,其后接宾语从句时,若从句表示否定意义,则常把否定词not转移到主句谓语部分。
I don't think (that) he is interested in that thing.
我认为他对那件事不感兴趣。
I don't believe she has finished the homework, has she?
我想她还没有写完作业,是吗?
(3)宾语从句的虚拟语气
表示"建议、命令、要求、决定、主张"等动词后的宾语从句要使用虚拟语气,即"should+动词原形",其中should可以省略。这类动词主要有insist, order, demand等。
He insisted that all of us (should) be there on time by any means.
他坚持要我们大家想尽办法按时去那儿。
[巧学助记]
后接宾语从句常用虚拟语气的动词口诀:
"一二三四"
一个坚持(insist);
两个命令(order, command);
三条建议(advise, suggest, recommend);
四项要求(demand, desire, require, request)。
[即时演练2]