isn’t的过去式是什么

isn’t的过去式是什么 isn't过去式 aren't过去式 spend过去式 live过去式 “didn't” 的过去式是什么? needn't的过去式是什么 isn't的复数形式是什么? isn't it 的肯定回答是什么 NO,there isn't的问句是什么? Isn't it boring的回答是什么 写出单词的过去式和现在式1.is的过去式：2.are的过去式：3.am not的过去式：4.isn‘t的过去式：5.weren’t的现在式：6.want的过去式： Isn't she beautiful?的回答是什么?Isn't she beautiful?的回答是什么 can't和want的过去式是什么? isn't working 和doesn't work的区别是什么 “What a lovely boy!”的反义疑问句是什么?A,isn't it?B,isn't he? isn't的意思 Is there a subway?No,there isn't.过去式 t的过去式!带t的过去式 there isn't any water的同义句是什么 The umberlla ___(isn't) behind the door just now.用所给动词的过去式填空.