Sentence patterns
subject-verb= sv
subject-verb-direct object=svo
subject-verb-indirect object-direct object=svio
subject-verb-predicate nominative=svn
subject-verb-predicate adjective=sva
subject-verb-direct object-object complement=svoc

3. "the coach of the field hockey team gave each member a certificate of achievment."
4. "fallen meteors have been discovered by scientists in various parts of the world."
5. "the correct answer to the question is the last one."

When a sentence has two or more subjects, that is called a compound subject. The individual subjects in a compound subject are joined by a coordinating conjunction (and, or, neither, nor). In Subject verb agreement, if subjects are joined by and, they are considered plural. For example, “The teacher and the principal plan to see her parents.” The teacher and the principal here are of different persons so we use the plural verb plan. However, in a sentence like this, “The teacher and principal plans to see her parents.” we use a singular verb plans because of the singular subject. The teacher here and the principal refers to only one person. The removal of the word the makes it singular. Now, since clowning and krumping is similar, we should use a singular verb.