In English, the verb 'to be' is used to form simple sentences such as 'The house is big'. The verb 'to be' is not necessary to form a simple sentence. Let's go through these points in more detail. Arabic verbs change according to the subject.Arabic words are formed according to a root system.The verb 'to be' is not necessary to form a simple sentence.First, let me give you a quick outline of the grammatical aspects of Arabic discussed here: Upon completion of the lesson you will be able to form simple Arabic sentences.
Don't be scared though - I'll explain everything in easy steps. Basic Arabic Course - Lesson 2: Arabic Grammar