This my friend,Wu Yifan哪个地方有错?

This my friend,Wu Yifan哪个地方有错? This is my friend wu Yifan He is a (boy) He is(This is my friend wu YifanHe is a (boy)He is( )and( )He has( ,)He has( ,)谁会? This is my teacher , Mr . Wu是什么意思? this is my friend This is my friend This ( )( )my friend(改为否定句) This is my friend,John. this boy is my friend this is my friend jane Is,new,this,my,friend(.) this is my my friend(变复数) This is mine friend or This is my friend why? This is my friend.These are my friend. wu lei wa wu ma yi wa si ki 读对话,选择正确的句子.Wu Yifan：What are you doing?Jim:( )Wu Yi fan：（ ）Jim：Yes,it's in January.Wu Yi fan:( )Jim:Jan.21.Wu Yifan:Can she play the computer?Jim:( )Wu Yifan :Your sister is so smart.But my sister can't.Jim:How old is s C:Hello!A:Hello!Is that Mr Wu? C:Yes.Who is it,please?A:This is Jack.my friend Emma can't find herpurse.Can you help her?把他们译成汉语 This is my friend 改为复数形式 This is my friend是什么意思快 This g____ is my friend,AMy,