have的过去式

have的过去式是had。在英语中，have的过去式有两种情况：一种是作为实义动词时，其过去式为had；另一种是作为助动词时，其过去式为had。例如：
作为实义动词： - I had a great time at the party last night. - She had a lot of homework to do over the weekend. - They had already left before we arrived.
作为助动词： - She had finished her work before the deadline. - We had just started our meal when the phone rang. - He had never been to that restaurant before.
在上面的例句中，可以看到have作为实义动词和助动词的用法，以及其过去式had在句子中的应用。因此，have的过去式是had，可以根据句子的语境来确定具体用法。