是have become还是 have became

是have become还是 have became 英语翻译如果问我们通过网络已经成为朋友呢? 是We had become friends through the internet.还是We have become friends through the internet.还是其它? 为什么是have become 而不是have became? have become过去式只改have，become不用改吗？ Environmental problems have become increasingly serious in developing countries.这里的表语是 serious?还是increasingly serious? You have become my favorite What Have We Become 歌词 Two hearts have become passive Have become accustomed to even Animal I Have Become 歌词 这句的have问题 lack of deliberation have become an stage这里使用have 还是has 是have a dinner 还是have dinner? which have become还是which has becomesth is one of the sth _very rare Thoughts have become crazy | love could become a thorn have是名词还是动词?`` have是单数还是复数? have是单数还是复数? have是谓语还是宾语