She said, "I am very happy to help you."→
She said that she was very happy to help you.
- 直接引语是一般(选择/反意)疑问句，变成间接引语时，由连词whether或if 引导。例如：
He asked me, "Do you like playing football?"→
He asked me if/whether I liked playing football.
注意：大多数情况下，if和whether 可以互换，但后有or not,或在动词不定式前，或放在介词后作连接词时，一般只用whether。例如：
She asked me whether he could do it or not.
He hesitated about whether to drive or take the train.
- 直接引语是特殊疑问句，变成间接引语时，由相应的疑问词who, whom, whose, how, when, why, where 等引导。例如：
My sister asked me, "How do you like the film?"→
My sister asked me how I liked the film.
- 直接引语是祈使句，变成间接引语时，把动词原形变成动词不定式，并在动词不定前加tell, ask, order 等的宾语。例如：
The captain ordered, "Be quiet."→
The captain ordered us to be quiet.
My teacher asked me, "Don't laugh."→
My teacher asked me not to laugh.
They told their son," The earth goes round the sun."→
They told their son that the earth goes round the sun.
(2)直接引语变间接引语时， 指示代词、时间状语、地点状语等要作相应的变化。如：this/that→ these/those, now→then, today→that day, yesterday→the day before, last year→the year before, ago→before, here→there等。 例如：
He said, "I haven't seen her today."→
He said that he hadn't seen her that day.
He asked Lucy, "Where did you go?"→
He asked Lucy where she went.
Tom said, "What do you want, Ann?"→
Tom asked Ann what she wanted.