The only time you don't need a stated subject in English is when using the imperative (command) form. All other types of sentences need both subjects AND verbs. I've never heard of an impersonal verb, but certainly there are impersonal pronouns.
Commands:
Shut the door.
Pass the salad, please.
Sit down.
(In those and all other commands, the subject is understood to be "you," the person/people to whom the speaker is speaking.)
(1) It rains.
(2) It is cold.
(3) It is growing dark.
(4) It seems that there is no end to this.
(5) It is unclear why he cut the rope.
(6) It snows a lot.
(7) It is snowing a lot.
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"Rains" and "snows" are impersonal verbs. It is an impersonal pronoun. Is 'is' an impersonal verbs? How can I find kinds of impersonal verbs? Long ago, those impersonal vers didn't need subjects, right?
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