he did not understand English.句中的为什么用did 而不用was?

he did not _____anything He did not understand English. he did not like him Tom did not buy the bike()did not he?did he?does he?do he? I did not buy anything.He did not,eith Did he turn round or not? he did not arrive until returned是什么意思 he did not go ( ) nightu开头的,. He did not give me surprises是什么意思 句子He did not find any gold? He (get) up early this morning,did not he? He did not marry until he was 40 years old' he has 承认 that he did not finish his homework He did not know what he could do.同意句 he must have read this book yesterday?反问?did not he?have not he?为什么 英语翻译使用that引导的从句He did not konw （）that I did not （） Tony did not go to school because he was illTony did not go to school (------)(-----)(------) i did not go shopping yesterday,he did not,either.为什么不用too或also