To punctuate a sentence, you can use and combine some of these patterns.
| Independent clause | . |
Example: Doctors are concerned about the rising death rate from asthma.
| Doctors are concerned about the rising death rate from asthma | . |
This pattern is an example of a simple sentence.
| Independent clause | , | coordinating conjunction | independent clause | . |
There are seven coordinating conjunctions: and, but, for, or, nor, so, yet.
Example: Doctors are concerned about the rising death rate from asthma, but they don't know the reasons for it.
| Doctors are concerned about the rising death rate from asthma | , | but | they don't know the reasons for it | . |
This pattern is an example of a compound sentence.
| Independent clause | ; | Independent clause | . |
Example: Doctors are concerned about the rising death rate from asthma; they are unsure of its cause.
| Doctors are concerned about the rising death rate from asthma | ; | they are unsure of its cause | . |
This pattern is an example of a compound sentence.
| Independent clause | ; | transition | , | independent clause | . |
Examples of transitions are the following: therefore, moreover, thus, consequently, however, also.
Example: Doctors are concerned about the rising death rate from asthma; therefore, they have called for more research into its causes.
| Doctors are concerned about the rising death rate from asthma | ; | therefore | , | they have called for more research into its causes | . |
This pattern is an example of a compound sentence.
| Subordinate Conjunction + dependent clause | , | Independent clause | . |
Examples of subordinate conjunction are as follows: because, before, since, while, although, if, until, when, then, after, as, as if.
Example: Because doctors are concerned about the rising death rate from asthma, they have called for more research into its causes.
| Because doctors are concerned about the rising death rate from asthma | , | they have called for more research into its causes | . |
This pattern is an example of a complex sentence.
| Independent clause | subordinate conjunction + dependent clause | . |
Examples of subordinate conjunctions are as follows: because, before, since, while, although, if, until, when, then, after, as, as if.
Example: Doctors are concerned about the rising death rate from asthma because it is a common, treatable illness.
| Doctors are concerned about the rising death rate from asthma | because it is a common, treatable illness | . |
This pattern is an example of a complex sentence.
| First part of an independent clause | , | non-essential clause or phrase | , | rest of the independent clause | . |
Example: Many doctors, including both pediatricians and family practice physicians, are concerned about the rising death rate from asthma.
| Many doctors | , | including both pediatricians and family practice physicians | , | are concerned about the rising death rate from asthma | . |
| First part of an independent clause | essential clause or phrase | rest of the independent clause | . |
Example: Many doctors who are concerned about the rising death rate from asthma have called for more research into its causes.
| Many doctors | who are concerned about the rising death rate from asthma | have called for more research into its causes | . |