is he your friend,为什么用is?

is he your friend,为什么用is? Is he your friend yes___. ( ) is your friend?He is a policman. （）he your friend yes,he is. how is your friend中为什么用is He with his friend is going to 为什么用is Is he your cousin?用friend改为选择疑问句 Is he your friend?改为复数 he your is friend 连词成句 是Is Jim your friend or her friend还是Is Jim your friend and he Is this your friend 肯定回答是什么?Is he your friend?还有 Is David yo is that your friend?