虚拟语气用法总结

Part One: 虚拟语气在非真实条件句中的用法

1. 非真实条件句中谓语动词的形式

注意：美国英语的结果主句，不管什么人称，皆常用 would 。
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在英语中,当what引导的名词性从句作主语时,主句的谓语动词（一般为be的某种形式）有时用单数形式，有时又用复数形式。如何处理这种主谓一致关系？本文拟对这一问题作些归纳。

1．在what引导名词性从句作主语时的SVC (即“主语+谓语动词+表语”)结构中,如果主语补语是单数名词或不可数名词,主句的谓语动词采取单数形式。例如：

What the boy wants is a toy car.

What the country needs most is wise leadership.

2．当主句的表语是复数名词时,主句的谓语动词通常用复数形式。例如：

What we need are good doctors.

What was real to him were the details of his life.

但在美国英语中主句的谓语动词也可以用单数形式：

Perhaps what is most surprising is the tears.

What we getting is old answers to old questions.
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概述

连词是一种虚词，用于连接单词、短语、从句或句子，在句子中不单独用作句子成分。连词按其性质可分为并列连词和从属连词。并列连词用于连接并列的单词、短语、从句或句子，如and, but, _or_ , for 等；从属连词主要引出名词性从句(主语从句、宾语从句、表语从句等)和状语从句(时间状语从句、条件状语从句、目的状语从句等)，引出名词性从句的连词如that, whether等，引出状语从句的连词如when, because, since, if 等。

连词用法和总结 - 并列连词

Part One: 表示转折关系的并列连词。

主要有 but(但是), yet(可是), while(而，却)等。如：

• I would have written before but I have been ill. 我本该早写信的，但我生病了。
• I have failed, yet I shall try again. 我失败了，但我还要尝试。
• You like tennis, while** I’d rather read. 你爱打网球，但我爱看书
• Someone borrowed my pen, but I don’t remember who. 有人借了我的钢笔，但我不记得是谁了。
• He said he was our friend, yet he wouldn’t help us. 他说他是我们的朋友，但却不肯帮助我们。