1. He is absent today. It’s ________ he is seriously ill.　 　because

3. 表语从句：从句在句中充当表语成分，一般放在连系动词之后. 作用：对主语进行解释说明。

连接词：that / whether /as if /as though( if 不引导表语从句)

连接代词：who / whom / whose / which / what

连接副词：when / where / why / how / because

The question is whether we can rely on him.

That’s because we were in need of money at that time.

He looked as if he was going to cry.

That’s why I was late.

because, as if 也可引导表语从句:

3. light travels in a straight line.

2. He had been away from his hometown for ten years

1. he was preparing for the examination

2. 如果主句谓语是过去时,从句谓语动词一般用过去的 　 某种时态,但从句表达的是客观事实、真理、自然规 　　 律等时，从句谓语通常用一般现在时。 　 1). 他告诉我他正在为考试做准备。 　 He told me ______________________ . 　 2). 他说他已离开家乡十年了。 　 He told me ______________________. 　 3). 老师告诉我们光是沿直线运行的。 　 The teacher tell us ______________________

1. 如果主句时态是现在时或将来时,从句谓语可根据句意需要而选用任一种时态. 　　 a .他相信他的梦想总有一天会实现的. 　　 He believes _________________________ . 　　 b .请告诉我你昨天这个时候在干什么. 　　 Please tell me _________________________.

a. his dream will come true some day

b. what you were doing at this time yesterday

6._______ you are not free tomorrow, I’ll go without you

Keys: 1.Whether/if　 2. whether　 　3.whether　 　4.whether　 　5. whether　 　6. If

2).that在宾语从句中的省略与保留

a.在主+谓+it(形式宾语)+宾补+that从句(真正宾语) 的句型中不省略.

　eg: We must make it clear that we mean what we say.

　　　 I don’t think it right that you leave home without telling your parents.

b.由连词and连接的两个由that引导的宾语从句中,第二个that 不省略.

eg: He told me( that) he would come and that he would come on time.

宾语从句的时态呼应

5. ______ they can do it matters little to us.

4. It depends on ______ we will have enough money.