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
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 keep one's end up
Fiil
to feel at home in a foreign language
Fiil
to be inquisitive of sth
Fiil