定语从句She is a ninth grade girl who wants to be a singer.为什么前面有序数词,还可以用that引导.定语从句中如果先行词有序数词必须用that而不用who.为什么这句序数词前放了一个a就可以用who.请详细点

定语从句She is a ninth grade girl who wants to be a singer.为什么前面有序数词,还可以用that引导.定语从句中如果先行词有序数词必须用that而不用who.为什么这句序数词前放了一个a就可以用who.请详细点 英语改句式John is a ninth grade student.He dreams of becoming a famous actor.(合并为含定语从句的复合句)John is a ninth grade student ___ _____ ____ ___ a famous actor 将We saw a girl just now 与 she is a british student连成定语从句 —How oid is you daughter?— __.she had a special party for her __birehday last week.A Nine,nineB Nine,ninthC Ninth,nineD Ninth,Ninth She is a girl.I want to meet her.改成定语从句 She is a kind girl.Everyone likes to talk to her(用who连成定语从句) she wears a pretty dress.it is the same as mine(合并定语从句） what she needs is a little salt,_she can find in the kitchen定语从句填空 She is the woman.I wrote a letter to her.改为定语从句变成定语从句是：She is the woman I wrote a letter to.可以改为：She is the woman to whom I wrote a letter. Millie is a good student , she is in the ____(ninth)grade this term We could draw the conclusion that she is a bad girl. 句中that后所跟从句是同位语从句还是定语从句? as引导的 定语从句She is such a lovely girl____is liked by everybodyA. as B. that应该选哪个? .the fact that she was a few minutes late is not reason for dismissing her .其主语是同位语从句还是定语从句 The ninth month of a year is the ninth month in a year is She is the teacher 和 She teaches us English怎么合并.定语从句 she got a red bike on her () birthday .A:ninth B:the ninth 将下列句子改为定语从句 Who is a servant?