How do you understand these English?

Be verbs are usually used in two ways. One is a simple sentence that connects the subject and the predication to form the table structure of the main system, and the other is an auxiliary verb that helps to form the tense and voice, such as the progressive tense. The passive be verb is used as an auxiliary verb. So be is a conjunctional verb in these two sentences, connecting the subject and the predicative. Although it means "yes", it is generally not translated.

The first sentence means: I am fine.

The second sentence means: the lamp or lamp (above) is on the cliff.

Although proficiency means proficiency and familiarity, it is not here. Here up is an adverb of orientation. On the cliff means on the cliff.