The U.S. Supreme Court ruled in 2005, however, that federal authorities could continue under federal law to prosecute California patients and providers engaged in the cultivation and use of marijuana for medical purposes.
A quick guide to using the colon. A colon is made up of two dots, one placed above the other. One common use of the colon is to introduce a list of items. For example: To make the perfect jam sandwich you need three things: some bread, butter and strawberry jam. Three items are listed in the sentence above.
Using a semicolon to extend a sentence is very handy. However, if you find yourself using them regularly, you should probably adjust the style of your writing. NOT A COMMA. It is possible to link two sentences together with a semicolon. It is also possible to link two sentences with comma + conjunction (e.g. , and, , or and, but) . Here's the key part: You cannot use just a comma to link two sentences. This is a very common mistake called a run-on error.