Compound Adjectives in English and Arabic as a contrastive study

Traditionally adjective phrases are defined as phrases that consist of an adjective and any modifier such as adverbs and preposition. They are the most frequent and considered the most prototypical grammatical from that function as noun modifiers. This research ,in particular, deals with one aspect of adjectives, namely, compound. They are words, phrases and clauses that function as adjective. They named compound adjectives. e.g. [The green-house effect]. It is important to introduce this descriptive class of words, to compare with Arabic language in order to maintain or limit the most important similarities and differences that can be found in both systems. Also we see as(an experience teacher of English language) that the students need to be aware and understand the meaning ,proper usage of this descriptive tools in order to develop their proficiency in English language.