1、直接引语中，引号内是陈述句的，变间接引语时用that引导。如

He

said,"I'm

a

teacher".(这是一个直接引语的句子，而且引号内是陈述句，所以变为间接引语时用that引导，而且that可省略。)-----He

said

(that)

he

was

a

teacher.

2、直接引语中，引号内是一般疑问句的，变间接引语时用if引导宾语从句，而且要把疑问句语序变为陈述句语序。

She

asked,"Are

you

Chinese?"(这个是一个直接引语的句子，而且引号内是一个一般疑问句，所以变间接引语时用if引导。）－－－－He

asked

if

I

was

Chinese.

3、直接引语中，引号内是特殊疑问句的，变间接引语时用疑问词来引导宾语从句，而且要把疑问句语序变为陈述句语序。

He

asked,"what's

that?"----He

asked

what

that

was

.

The

teacher

asked,"where

is

the

book?"-----The

teacher

asked

where

the

book

was.

My

mother

asked,"why

didn't

you

go

home

yesterday?"----My

mother

asked

why

I

hadn't

gone

home

the

day

before

yesterday.(这里做了时态、人称、时间状语的变化）