a. Adjective: We use adjectives to describe nouns. Most adjectives can be used in front of a noun (e.g. They have a beautiful house.) or after a link verb: be, look or feel (e.g. Their house is beautiful.)
b. Adverb: A word or phrase that modifies the meaning of an adjective, verb, or other adverb, expressing manner, place, time, or degree (e.g. gently, here, now, very). Some adverbs like sentence adverbs, can also be used to modify whole sentences. (e.g. The meeting went well and the directors were extremely happy with the outcome.)
c. Adverbial: A word or phrase functioning as a major clause constituent and the adverbial is an adverb, adverbial phrase or adverbial clause which gives us additional information about the time, place, or manner of the action which is described in the rest of the sentence. (e.g. We have been living here in this house for over twenty years.)
Idiom 365
Separate Sheep from Goats: examining a group of people and deciding their suitability
Example: Audition test was conducted by the director to separate sheep from goats.