For the sentence
The bed is white and silent,and much life can hide beneath its blankets.
The complete predicate is: is white and silent,and much life can hide beneath its blankets.
The subject of the sentence is THE BED.The predicate refers to the part of the sentence that contains the verb, in this case the verb is "IS", and also states something about the subject, which in this case " white and silent,and much life can hide beneath its blankets.