manyatime------swimmingaloneA.wenttheboyB.didtheboygo为什么选B不选A,谁能帮我解释下么

Question

many a time ------swimming alone
A.went the boy B.did the boy go
为什么选B不选A,谁能帮我解释下么

Answer 1

你好.many a time本来就是一种强调句的形式,如果放在句首,这个句子就要倒装.又如：
Many a time have we met by chance in the street, on our way to work , in the morning.