ls this an apple?的肯定回答是Yes,this is an apple.还是Yes,it is an a

ls this an apple?的肯定回答是Yes,this is an apple.还是Yes,it is an a This is an apple.的否定句,疑问句,肯定回答,否定回答.学 These are an apple and a pear.还是This is an apple and a pear. is this an apple an orange__an egg This red apple is big.It is _big apple.a.an b.a c.\ Is this an eraser?yes,it is are----- ------.yes------ ------ This is an apple就an apple部分转换提问 this is an apple 和 this is apple 哪个语法是正确的 this is an apple的an为什么不可以是a "Is that an orange or an apple?"" " 1.Yes,it's an orange 2.N Ls this an orange ? Yes,is is . Are（ ） （ )? yes,( ) ( ) 改为复数 英语按要求写句子This is an apple(一般疑问句,肯定回答)