Many a time, many a man etc. means many times, many men etc. When we use these expressions we intend to explain a situation where the subject is plural. But structurally ‘many’ follows a plural verb whereas ‘many a’ follows a singular verb though both mean more than one.
- Many men have come here with the same request.
Many a man has come here with the same request.
(here also it means more than one man)
- We have been there many times.
(OR – you can say – We have been there many a time)
- I have told you many times not to go there.
(OR – I have told you many a time not to go there)
- Many young girls have approached the director for a chance in the film.
(OR – Many a young girl has approached the director for a chance in the film)