German-English translations for must-have

have
us
I have a house and a car.Look what I have here — a frog I found on the street!Do you have the key? (not necessarily ones own key
must
us
If it has rained all day, it must be very wet outside.You picked one of two, and it wasnt the first: it must have been the second.You must arrive in class on time. — the requirement is an imperative