1 Outside of Knee: Pain on the outside of the knee, or lateral side, is commonly caused by lateral meniscus tears, LCL injuries, IT band tendonitis, and arthritis.  Back of Knee: Pain in the back of the knee can be due to the collection of fluid, called a Baker's Cyst.
Definition: The subject of a sentence is the noun, pronoun or noun phrase that precedes and governs the main verb. The subject is the part of the sentence that performs an action or which is associated with the action. He is a really nice guy. * He is the subject of the sentence, controlling the verb and the complement.
Definition of inquire from the Collins English Dictionary Direct and indirect objects The object of a sentence(if there is one) normally comes after the verb phrase. Whether there is an object or not depends on the meaning of the verb. For example, if you want to talk about what someo... Read more about 'Direct and indirect objects'