Is this your friend?不知道是男性女性情况下如何作答?

Is this?your friend is Is this girl your friend?Is this your girl friend? Is this your boy friend?Is this boy your friend?Is this your friend?的否定 回答 Is this your friend?改为复数形式 Is this girl your friend 复数句 Is this your friend?怎么回答 .Is this girl your friend?(否定回答) Is this your friend?做否定回答 is this dress your friend's?可以说成 is this your friend's dress This is (he)schoolbag.Is (he)your friend?填空 Is this your friend's notebook?(改为陈述句） This is _____（definite) a letter from your pen-friend This is a email.You can send your friend an ( ) This is a friend of____.A.myB.mineC..youD.your This is a email.You can send your friend a ( )This is a email.You can send your friend a ( ) is this your friend?yes,()is .A.this B.tis this your friend?yes,()is .A.this B.that C.it D.he Is this your friend 肯定回答是什么?Is he your friend?还有 Is David your friend 的回答是?请分别回答! This is my friend.(改为一般疑问句)_________ ___________ your friend?