we've happened upon a bit of a problem什么意思

we've happened upon a bit of a problem什么意思 We’ve这里ve是什么意思? We've missed we've got the We've Got The we've中的 've是什么的缩写? we've 是什么缩写?we've 是什么缩写? 'Cause we've just begun. we've been hiding enough We've got our schoolbags. The time we've lost we've got ours already All We've Ever Known we've got to revive We’ve的完整形式! we've unboxed the box. we've的全称是什么 can we just forget what happened?