How to judge whether a sentence is a clause?

First of all, we should know the definition of clause

A clause can't be a sentence alone, but it also has a subject part and a predicate part, just like a sentence. The difference is that the clause must be guided by a connective word. According to the main differences of guiding clauses, it can be roughly divided into six categories: subject clauses, predicative clauses, object clauses, appositive clauses, attributive clauses and adverbial clauses. The first four categories are called nominal clauses because the subject clause, predicative clause, object clause and appositive clause are equivalent to nouns in sentences. The attributive clause is equivalent to an adjective, which is called an adjective clause. The adverbial clause is equivalent to an adverb, which is called an adverbial clause. Adverbial clauses can also be divided into conditional adverbial clauses, cause adverbial clauses, place adverbial clauses, purpose adverbial clauses, adverbial clause, comparative adverbial clauses, mode adverbial clauses, result adverbial clauses and time adverbial clauses.

Then look for keywords from each clause to judge. I suggest you take a look at my Baidu link, which is very detailed ~ mainly needs to be clearly defined ~

I hope it will help you ~