Unit one Friendship
iii 時態(tài)的變化（2）
1）含情態(tài)動詞的一般現(xiàn)在時變?yōu)榍閼B(tài)動詞的一般過去時。
e.g. she said, “he can swim very well.”
she said that he could swim very well.
注：1）如果直接引語的情態(tài)動詞是一般過去時，間接引語還是用情態(tài)動詞的過去一般時。
e.g. she said, “he could swim very well.”
she said that he could swim very well.
2）有些情態(tài)動詞如must, ought to, need, had better等只有一種形式，那么在間接引語中形式不變。
e.g. he said, “i must study hard.”
he said that he must study hard.
2、直接引語為祈使句
直接引語為祈使句，變?yōu)殚g接引語時將祈使句的動詞原形變?yōu)閹o的不定式。引述動詞有：tell, ask, order等。它的否定是在to前加not。它沒有時態(tài)的變化。其他的變化和直接引語是陳述句的情況相同。
e.g. i said to her, “please give me a glass of water.”
i asked her to give me a glass of water.
she said to him, “come at five o’clock.”
she told him to come at five o’clock.
he said, “don’t make so much noise, boys.”
he told the boys not to make so much noise.
3、直接引語為疑問句（1）
直接引語為疑問句，變?yōu)殚g接引語時語序與一般從句相同，用陳述句的語序，be, have等助動詞皆放在主語之后。引述動詞常用say, ask, wonder, inquire等。直接引語為陳述句變?yōu)殚g接引語應作各種變化的要求也同樣使用。
1）直接引語為一般疑問句時，由whether或if引導。
e.g. he said to us, “are you going away today?”
he asked to us whether we were going away that day.
she said, “is he your brother?”
she asked if he was my brother.