isn't过去式 aren't过去式 spend过去式 live过去式

isn't过去式 aren't过去式 spend过去式 live过去式 isn’t的过去式是什么 英语的aren't的过去式 Is there a subway?No,there isn't.过去式 t的过去式!带t的过去式 过去式发音是t can't的过去式 英语过去式 can't didn't的过去式 can't的过去式 don't的过去式 对么,用isn`t还是aren`t 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： 初二下英语试题You are Andy's sister,A isn't she B aren't you C isn't he There________good news in today's newpaper.A aren't many B isn't much C aren't lots of D isn't lots of 答案是b为什么 isn't aren't don't doesn't的区别! Those ties weren't nice.书中反复用weren't,没有说明是过去式,可以用 aren't 请问；isn't ,aren't ,let's 的完整形式是啥?