宾语从句的时态受主句的限制，
既：主句是一般现在时态，从句根据实际情况而定。
主句是一般过去时态，从句用相应的过去的时态。
例:1)She says that she is a
student.
She said that she was a student.
4)She says that she
can sing a song in English.
She said that she
could sing a song in English.
如果宾语从句说的是客观真理、自然现象或事实时，这时宾语从句要用一般现在时态。
例：The teacher said that the earth
goes round the sun.
He told me that Japan is an
island country.
Could you tell me…是用来征询对方的意见，语气委婉，并不表示过去。
例：Could you tell me when we will
visit the Histury
Museum?
例：She said: “I have been to England
before.” →She said that she had been to England before.
She asked me: “Do you like maths?” →
She asked me if I liked maths.
★注意：当从句的原句为以下句子以及what, who作主语时，语序不变：
What’s wrong? What’s the matter? What’s happening?
What happeneed?
eg: I
don’t know what’s the matter.
Can you tell me
who is over there?
宾语从句与简单句的交换。
★由连接代词和连接副词引导的宾语从句，如果宾语从句的主语和主句的主语是同一个人时，可以用“疑问词+不定式”做宾语的简单句结构。
例：I don’t know what I should do
next. → I don’t know what to do next.
He didn’t know where he
would live. → He didn’t know where to live.
宾语从句的否定：
★如主句主语是第一人称I, we，且谓语动词是think,believe, suppose, expect,guess等表心理活动的动词时，变否定要否定转移，即否定主句。否则否定看从句。
I think chicken can swim. → I don’t think chicken can swim.(我认为鸡不会游泳)
He says that Lily goes shopping. → He says that Lily doesn’t go
shopping.(他说lily没去购物)。
变反意疑问句:如主句主语是第一人称I, we，且谓语动词是think,guess,believe等表心理活动的动词时，变反意疑问句时看从句，否则看主句。
I think he is a good student, is’t he?
They want to know if he is a good student, don’t they?
值得注意的是，当这些词后接的宾语从句的否定转移到主句时，其仍属否定词，故其后的短语句式应为肯定。
e.g.I don't
believe that he can translate this book, can he?
We don’t believe
that man is killed by Jim,is he? 我认为那个人不是Jim所杀的,是不是?
做练习：
you see________?
A. what he’s reading B. what is he
reading C. what does he read D. he reads what
2.Does Jack come from Japan? Do you
know?(合并成一个句子)
Do you know_____Jack
_____from Japan?