My grandpa is very old now ,but he was a dotor before。(改为同义句)
My grandpa — — — a doctor but now he is very old 。
My grandpa is very old now ,but he was a dotor before。(改为同义句)
My grandpa — — — a doctor but now he is very old 。
used to be 曾经是
used to be(过去是)
望采纳
used to be