Question

1.This is my brother

2.These are my brothers
3.That is my sister
4.Those are my sister
改为一般疑问句，分别用肯、否定句回答

Answer 1

Is this your brother?
Yes, it is./No, it isn't.

Are these your brothers？
Yes， they are./No, they aren't.

Is that your sister?
Yes, it is./No, it isn't.

Are those your sisters?
Yes, they are./No, they aren't.

Answer 2

1.Is this your brother?
Yes,he is./No,he isn't.
2.Are these your brothers?
Yes,they are./No,they aren't.
3.Is that your sister?
Yes,she is./No,she isn't.
4.Are those your sisters?
Yes,they are./No,they aren't.
望采纳,谢谢

Answer 3

1. Is this your brother? Yes, he is. / No, he isn't.
2. Are these your brothers? Yes, they are./ No, they aren't.
3. Is that your sister? Yes, she is./ No, she isn't.
4. Are those your sisters? Yes, they are. /No, they aren't.

Answer 4

将BE动词提前大写则改为一般疑问句。肯定回答，Yes ,he is .No ,he is not .
Yes ,they are .No ,they are not .
Yes ,she is .No ,she is not .
Yes ,they are .No ,they are not .