The dog was trapped there for two weeks 后面的for two weeks 不是用

The dog was trapped句子用的时态是过去式的被动.
如果改成The dog have been trapped there for two weeks there也是正确的,只是强调对现在的影响,暗示着两周前这个狗被困在这儿,而现在还是困在这儿.
The dog was trapped there for two weeks 暗示着这个狗曾经被困在这儿过两个周,现在还在不在这儿就不一定了