Causes of Breast Bone Pain. 1  Heartburn or reflux is the most common cause of a burning pain along and under the breast bone as a result of esophagitis. Gastroesophageal reflux (GERD) may also result in episodes of severe sharp pains in the chest and is often mistaken for a myocardial infarction (heart attack) during these episodes.
A complex sentence contains an independent clause and at least one dependent clause. A sentence with two or more independent clauses plus (one or more) dependent clauses is referred to as a compound-complex sentence. (Every clause contains a subject and predicate).
This digital handout categorizes clauses into independent and dependent clauses. This simply means that some clauses can stand by themselves, as separate sentences, and some can't. Another term for dependent clause is subordinate clause: this means that the clause is subordinate to another element (the independent clause) and depends on that other element for its meaning.