⏳since

I have known her since childhood.

How much sincere are your friends to learn their lessons?

Who of your friends is most sincere in learning his lessons?

How much are your friends sincere in learning their lessons?

How much sincere are your colleagues to complete their tasks?

Having been sincere with his work he earned promotion at the company.

Having been sincere with his studies he obtained A+ in the SSC exam last year.

Your presence is sincerely desired at the marriage ceremony of my only sister.

Your presence is sincerely desired at the birthday party of my younger brother.

Many people will be able to succeed in eternal and worldly life if they try sincerely.

Having been sincere with her training she received a gold medal in the Vasanth Academy competition.