题目内容：

John went to his grandmother once a week(once a week)划线,就划线部分提问

优质解答

翻译吗?
约翰一周去他组母那一次
once a week的意思是一周一次
你是说对once a week 提问吗?
请看:How often did John go to his grandmother?
how often 表示频率