Question

В каком предложении сказуемое выражено безличном глаголом?1, вечером был дождь2, с утра морозило3,мальчик нездоров.4, луна освещала всю реку

Answer 1

Во втором. Морозило - безличный глагол.

Answer 2

Identifying Impersonal Verbs in Sentences

In the given sentences, the impersonal verb is expressed in sentence number 2, "с утра морозило."

Impersonal verbs are verbs that do not have a specific subject and are used to describe general conditions or actions. In this case, "морозило" describes the general condition of frost in the morning without specifying a particular subject.