___your father and mother at home?该填is或are?为什么?（Is） your father at home?为什么括号中填is?还有she wants to (write)an e-mail to her parents,为什么括号中填的不用加s?

___your father and mother at home?该填is或are?为什么?（Is） your father at home?为什么括号中填is?还有she wants to (write)an e-mail to her parents,为什么括号中填的不用加s?
___your father and mother at home?该填is或are?为什么?
（Is） your father at home?为什么括号中填is?
还有she wants to (write)an e-mail to her parents,为什么括号中填的不用加s?

___your father and mother at home?该填is或are?为什么?（Is） your father at home?为什么括号中填is?还有she wants to (write)an e-mail to her parents,为什么括号中填的不用加s?
1.__your father and mother at home?该填is或are?为什么?
答案：Are
解析：主语是your father and mother,复数用 are
2.（Is） your father at home?为什么括号中填is?
答案：Is
解析：主语是your father,第三人称单数,用单数is
be动词的一般现在时：I am; you are; he/ she/ it 用is; 复数用 are
3.she wants to (write)an e-mail to her parents
结构：want to do sth.想做某事,所以write 不加s
不明白的再问哟,请及时采纳,多谢!

and 连接的词算复数 ，所以应该填 are
your father 是一个人！是单数所以用is

你好，
应该是： Are your father and mother at home? 你爸爸妈妈在家吗？
因为father and mother 是复数，所以用Are

Is your father at home? 你妈妈在家吗？
father是单数...

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你好，
应该是： Are your father and mother at home? 你爸爸妈妈在家吗？
因为father and mother 是复数，所以用Are

Is your father at home? 你妈妈在家吗？
father是单数第三人称，所以用is.

she wants to (write)an e-mail to her parents 她想给她父母亲写邮件。
want to do sth 想做某事，所以括号里wirte不加s, 用原形。


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Are. 因为用and连接 表示复数
爸爸是单数 所以用is

1. Are。因为父亲+母亲一共是2个人，复数。主谓要一致。

2. Is。因为父亲是单数。还是主谓一致的问题。

3. to 后面加动词原形。在这句话中，to后面是形容她想要做的事情/动作的。want后已经由s，主谓已一致了。
   

第一个填is，原因是，主语是your father and mather，不是your father and your mather, your father and mather是一个主题， 若是your father and your mather则用are！！