Are these sentence types correct?
Complex
While
scientists are studying past diseases such as the Spanish flu, they
constantly worry about the next pandemic to strike.
Compound
Various research facilities, such as the World Health Organization, are continually studying various new diseases, and tracking old diseases.
Compound-Complex
Because the W.H.O. continues to track older strands of the
influenza virus, it records the evolution of a virus, and may be the
first
to warn the world of a new disease.
Your first sentence is labeled correctly.
A compound sentence has two independent clauses. The sentence you labeled as compound is a simple sentence.
The sentence you labeled compound- complex is a complex sentence. Compound-complex sentences have two independent clauses plus one or more dependent clauses.
thank you so much!!! i may post a few more in the next couple minutes to make sure those sentences are correct as well... THANK YOU!!!!
i agreee with mrs. sue because she rocks !!!!!!!! :D:D:D:D:D ;)
Yes, the sentence types that you provided are correct.
The first sentence is an example of a complex sentence. It contains an independent clause ("scientists are studying past diseases") and a dependent clause ("such as the Spanish flu").
The second sentence is a compound sentence. It includes two independent clauses joined together with a comma and the coordinating conjunction "and" ("Various research facilities are continually studying various new diseases" and "tracking old diseases").
The third sentence is a compound-complex sentence. It consists of one independent clause ("Because the W.H.O. continues to track older strands of the influenza virus") and two dependent clauses ("it records the evolution of a virus" and "may be the first to warn the world of a new disease").