为什么have的过去式是had而不是haved?哪些单词的过去式是规定的.

为什么have的过去式是had而不是haved?哪些单词的过去式是规定的. 请问：I have had my breakfast 请问：为什么这个句子要用“have had”,had 是“have”的过去式,为什么用两个“have”呀? had better是“最好.还是”的 意思,had是have的过去式,这里为什么要用had,不要告诉我是规定噢. 为什么shop的过去式是shopped而不是shoped? 为什么 say的过去式是said而不是saied have done和had done的区别如题,为什么有一题中文是他妹妹已经死了,用has gone而不是had gone had的用法!i had be happy这句话什么意思?为什么要用have的过去式? Your father is sleeping.you had better not wake him up.为什么用have的过去式had 1.I have just _______ an invitation to their wedding this morning疑问：我觉得accept和receive都可以 为什么答案是receive呢?2.Alice came back home the day before yesterday.Really?Where ______疑问：为什么是had she been 而不是ha （它们的过去式是HAD,试试用HAVE,HAS和HAD填空） 1.My mother__a yellow coat. You had better not smoke here,( 为什么后面接的是had you而不是will you since this semester began ,we have had four tests.为什么从句是一般过去式,主句是现在完成时. had watched TVI had watched TV,这应该是一般过去时吧,动词变过去时have变had,可是watch为什么也变成了过去式,过去完成时的结构是什么 关于一道have与have got用法的题he had a drink before dinner.这句话不能用have got替换因为是例句是过去式可是为什么he had to leave early 就可以呢不是同样是过去式么 have to加动词的过去式,had to加什么? 为什么Jack hurt his back playing volleyball中的play用的是ing形式而不是过去式? had是什么的过去式? She and her family hid away for nearly 25 months before they were discovered.为什么要用hide的过去式而不是 had hidden away