"do you need a pen?"lucy asked如何变为间接引语? "what do you want?"lucy asked同上.

Lucy asked if I need a pen.
Lucy asked what I want.直接引语变为间接的不是有时态的变化吗？？一般现在时不是要变为一般过去式吗？？Lucy asked whether i needed a pen............Lucy asked what w wanted.直接引语变成间接引语时时态的变化情况有两种，即改变时态和不改变时态。1、直接引语变成间接引语时，从句时态无须改变的情况 　　1）当主句的谓语动词是一般现在时的时候，如： 　　He always says, “I am tired out.” ——>He always says that he is tired out. 　　2）当主句的谓语动词是将来时的时候，如： 　　He will say, “I'll try my best to help you.” ——>He will say that he will try his best to help me. 3）当直接引语部分带有具体的过去时间状语时，如： 　　He said, “I went to college in 1994.” ——>He told us that he went to college in 1994. 　　4）当直接引语中有以when, while引导的从句，表示过去的时间时，如： 　　He said，“When I was a child, I usually played football after school.” ——> 　　He said that when he was a child, he usually played football after school. 　　5）当直接引语是客观真理或自然现象时，如： 　　Our teacher said to us, “Light travels faster than sound.” ——> 　　Our teacher told us that light travels faster than sound. 　　6）当引语是谚语、格言时，如： 　　He said，“Practice makes perfect.” ——>He said that practice makes perfect. 　　7）当直接引语中有情态动词should, would, could, had better, would rather, might, must, ought to, used t-o, need时，如： 　　The teacher said, “You needn't hand in your compositions today.”——> 　　The teacher said we needn't/didn't need to/didn't have to hand in our compositions. 　　2、直接引语变成间接引语时，从句时态需要改变的情况 　直接引语改为间接引语时，主句中的谓语动词如果是过去时，从句（即间接引语部分）的谓语动词在时态方面要作相应的变化，变成过去时范畴的各种时态（注意，首先要判断是否符合第一种情况、即是否符合时态不变的情况），变化如下： 　直接引语间接引语　 　一般过去时 过去完成时现在进行时 过去进行时 现在完成时 过去完成时 　过去完成时 过去完成时 （不变） 过去进行时 过去进行时 一般将来时 过去将来时