简单,无暇英语书P27可以模仿的I forgot my keys are there.我不知道钥匙在哪里:I do not know where the key你也要动动脑筋的呀~
are改成WERE
I forgot where my keys were.前后应一致
是,虽然我认为是is
I forget where my keys are.或者 I forgot where my keys were.