1. Fiil to be positive
to know the rights of a case Fiil
to feel perfectly at home on a subject Fiil
to know something perfectly Fiil
to have something at one's finger ends Fiil
to have a perfect knowledge of sth Fiil
to be at home with sth Fiil
to be thoroughly familiar with sth Fiil
to know something backwards Fiil
to know something inside out Fiil
to know your way around something Fiil
at one's finger tips
to be well aware Fiil
to know better Fiil
to be well aware Fiil
to know how to turn a penny Fiil
to know one's grammar Fiil
to be well up in one's subject Fiil
to be well up in one's subject Fiil
to know one's trade Fiil
to keep one's end up Fiil
to feel at home in a foreign language Fiil
to be inquisitive of sth Fiil