Do/try your level best (to do something) verb phrase
To try as hard as one can
To reach that peak, I have done my level best.
I always try my level best to enhance my surfing skills.
I will do my level best to get you the ticket.
1. If you say enough bad things about someone, some of them will be believed.
2. Try many different ways or ideas, some of them will work.
To think or consider something seriously
To despise or make determined attempts less strong
Making a start on something is always difficult.
The verb "do/try" should be conjugated according to its tense.