敢是

chắc là; e rằng

perhaps; maybe; probably 这不像是去医院的路， 敢是 走错了吧？ This doesn't look like the way to hospital. I'm afraid/I fear we may have taken the wrong road. 有人敲门， 敢是 妈妈吧？ Someone is knocking at the door; I think/I dare say it's Mother. 她好久没给我写信了， 敢是 忘了我的地址？ She hasn't written to me for ages; perhaps she's lost my address.