Comparison of Complement Clauses in Persian and Russian Languages with Focus on the Words that Need Complement

In Persian, the complement subordinate clause is known as one of the direct dependents of the verb, but in Russian, it can also be dependent on the verb, noun, short adjective, or predicative adverbs. In this study, we have examined the types of complement clauses in Russian and Persian, and since the main difference between these clauses in these two languages is in the words that need an obligatory dependent or complement, we will examine these words in Russian and also how to express these clauses in Persian. The purpose of this study is to find similarities and fundamental differences between the complement subordinate clause and the words that need a complement in both Russian and Persian by carefully examining the complement subordinate clause and the words that need a complement and obligatory dependent in both languages. Therefore, take a step to facilitate the teaching of Russian compound sentences to Persian-speaking students. Most Complement clauses in Persian are obligatory and dependent on verbs. Also, in the studies conducted, it was found that the complement clauses related to predicative adverbs in Russian are expressed in Persian with the complement clause related to evaluative, positive, and aspect verbs, and the clauses related to short adjectives in the Persian language come with the adverbial cause clause.Also, in the studies conducted, it was found that the complement clauses related to predicative adverbs in Russian are expressed in Persian with the complement clause related to evaluative, positive, and aspect verbs, and the clauses related to short adjectives in Persian language come with the adverbial cause clause.