更新1: 除了说明过去 就没有其他情况 需要转要was吗?
Be 的现在式是 is
am
are; 过去式是 was
were. He
she
it 现在式用 is; 过去式用 was. I 现在式用 am; 过去式用 was. You
we
they 现在式用 arre; 过去式用 were. 现在式当然是指现在或时常发生的事; 过去式是指以前发生的事。 而 I am happy 是我很高兴; I was happy 是过去式. 若是 I hope I were happy 则是我希望我会高兴.
i was happy is 错的，因为was是过去的，i was happy=我之前开心，代表他死了
is / am / are ...... (present tense) was / were .........( past tense). You never say .. " I was a boy" you say " I am a boy" but you can say " When I was a boy
I ..........." was 是过去式
一定用于讲过去的事情. eg. " I was so happy with you last night" " At that time I was the chairman of the English Club. " " I was going to ........... yesterday. " 如 Bees Gee 有首歌 ...(First of May) ..." When I was young the x'mas tree was *** all"